
<!DOCTYPE html>
<html lang="en" xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en" xmlns:fb="http://www.facebook.com/2008/fbml" >
<head>
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta http-equiv="content-type" content="text/html;charset=utf-8" /><script type="text/javascript">(window.NREUM||(NREUM={})).loader_config={xpid:"UQ8EUVRACQAFVVdbAQk="};window.NREUM||(NREUM={}),__nr_require=function(t,n,e){function r(e){if(!n[e]){var o=n[e]={exports:{}};t[e][0].call(o.exports,function(n){var o=t[e][1][n];return r(o||n)},o,o.exports)}return n[e].exports}if("function"==typeof __nr_require)return __nr_require;for(var o=0;o<e.length;o++)r(e[o]);return r}({1:[function(t,n,e){function r(t){try{s.console&&console.log(t)}catch(n){}}var o,i=t("ee"),a=t(15),s={};try{o=localStorage.getItem("__nr_flags").split(","),console&&"function"==typeof console.log&&(s.console=!0,o.indexOf("dev")!==-1&&(s.dev=!0),o.indexOf("nr_dev")!==-1&&(s.nrDev=!0))}catch(c){}s.nrDev&&i.on("internal-error",function(t){r(t.stack)}),s.dev&&i.on("fn-err",function(t,n,e){r(e.stack)}),s.dev&&(r("NR AGENT IN DEVELOPMENT MODE"),r("flags: "+a(s,function(t,n){return t}).join(", ")))},{}],2:[function(t,n,e){function r(t,n,e,r,s){try{p?p-=1:o(s||new UncaughtException(t,n,e),!0)}catch(f){try{i("ierr",[f,c.now(),!0])}catch(d){}}return"function"==typeof u&&u.apply(this,a(arguments))}function UncaughtException(t,n,e){this.message=t||"Uncaught error with no additional information",this.sourceURL=n,this.line=e}function o(t,n){var e=n?null:c.now();i("err",[t,e])}var i=t("handle"),a=t(16),s=t("ee"),c=t("loader"),f=t("gos"),u=window.onerror,d=!1,l="nr@seenError",p=0;c.features.err=!0,t(1),window.onerror=r;try{throw new Error}catch(h){"stack"in h&&(t(8),t(7),"addEventListener"in window&&t(5),c.xhrWrappable&&t(9),d=!0)}s.on("fn-start",function(t,n,e){d&&(p+=1)}),s.on("fn-err",function(t,n,e){d&&!e[l]&&(f(e,l,function(){return!0}),this.thrown=!0,o(e))}),s.on("fn-end",function(){d&&!this.thrown&&p>0&&(p-=1)}),s.on("internal-error",function(t){i("ierr",[t,c.now(),!0])})},{}],3:[function(t,n,e){t("loader").features.ins=!0},{}],4:[function(t,n,e){function r(t){}if(window.performance&&window.performance.timing&&window.performance.getEntriesByType){var o=t("ee"),i=t("handle"),a=t(8),s=t(7),c="learResourceTimings",f="addEventListener",u="resourcetimingbufferfull",d="bstResource",l="resource",p="-start",h="-end",m="fn"+p,w="fn"+h,v="bstTimer",y="pushState",g=t("loader");g.features.stn=!0,t(6);var b=NREUM.o.EV;o.on(m,function(t,n){var e=t[0];e instanceof b&&(this.bstStart=g.now())}),o.on(w,function(t,n){var e=t[0];e instanceof b&&i("bst",[e,n,this.bstStart,g.now()])}),a.on(m,function(t,n,e){this.bstStart=g.now(),this.bstType=e}),a.on(w,function(t,n){i(v,[n,this.bstStart,g.now(),this.bstType])}),s.on(m,function(){this.bstStart=g.now()}),s.on(w,function(t,n){i(v,[n,this.bstStart,g.now(),"requestAnimationFrame"])}),o.on(y+p,function(t){this.time=g.now(),this.startPath=location.pathname+location.hash}),o.on(y+h,function(t){i("bstHist",[location.pathname+location.hash,this.startPath,this.time])}),f in window.performance&&(window.performance["c"+c]?window.performance[f](u,function(t){i(d,[window.performance.getEntriesByType(l)]),window.performance["c"+c]()},!1):window.performance[f]("webkit"+u,function(t){i(d,[window.performance.getEntriesByType(l)]),window.performance["webkitC"+c]()},!1)),document[f]("scroll",r,{passive:!0}),document[f]("keypress",r,!1),document[f]("click",r,!1)}},{}],5:[function(t,n,e){function r(t){for(var n=t;n&&!n.hasOwnProperty(u);)n=Object.getPrototypeOf(n);n&&o(n)}function o(t){s.inPlace(t,[u,d],"-",i)}function i(t,n){return t[1]}var a=t("ee").get("events"),s=t(18)(a,!0),c=t("gos"),f=XMLHttpRequest,u="addEventListener",d="removeEventListener";n.exports=a,"getPrototypeOf"in Object?(r(document),r(window),r(f.prototype)):f.prototype.hasOwnProperty(u)&&(o(window),o(f.prototype)),a.on(u+"-start",function(t,n){var e=t[1],r=c(e,"nr@wrapped",function(){function t(){if("function"==typeof e.handleEvent)return e.handleEvent.apply(e,arguments)}var n={object:t,"function":e}[typeof e];return n?s(n,"fn-",null,n.name||"anonymous"):e});this.wrapped=t[1]=r}),a.on(d+"-start",function(t){t[1]=this.wrapped||t[1]})},{}],6:[function(t,n,e){var r=t("ee").get("history"),o=t(18)(r);n.exports=r,o.inPlace(window.history,["pushState","replaceState"],"-")},{}],7:[function(t,n,e){var r=t("ee").get("raf"),o=t(18)(r),i="equestAnimationFrame";n.exports=r,o.inPlace(window,["r"+i,"mozR"+i,"webkitR"+i,"msR"+i],"raf-"),r.on("raf-start",function(t){t[0]=o(t[0],"fn-")})},{}],8:[function(t,n,e){function r(t,n,e){t[0]=a(t[0],"fn-",null,e)}function o(t,n,e){this.method=e,this.timerDuration=isNaN(t[1])?0:+t[1],t[0]=a(t[0],"fn-",this,e)}var i=t("ee").get("timer"),a=t(18)(i),s="setTimeout",c="setInterval",f="clearTimeout",u="-start",d="-";n.exports=i,a.inPlace(window,[s,"setImmediate"],s+d),a.inPlace(window,[c],c+d),a.inPlace(window,[f,"clearImmediate"],f+d),i.on(c+u,r),i.on(s+u,o)},{}],9:[function(t,n,e){function r(t,n){d.inPlace(n,["onreadystatechange"],"fn-",s)}function o(){var t=this,n=u.context(t);t.readyState>3&&!n.resolved&&(n.resolved=!0,u.emit("xhr-resolved",[],t)),d.inPlace(t,y,"fn-",s)}function i(t){g.push(t),h&&(x?x.then(a):w?w(a):(E=-E,O.data=E))}function a(){for(var t=0;t<g.length;t++)r([],g[t]);g.length&&(g=[])}function s(t,n){return n}function c(t,n){for(var e in t)n[e]=t[e];return n}t(5);var f=t("ee"),u=f.get("xhr"),d=t(18)(u),l=NREUM.o,p=l.XHR,h=l.MO,m=l.PR,w=l.SI,v="readystatechange",y=["onload","onerror","onabort","onloadstart","onloadend","onprogress","ontimeout"],g=[];n.exports=u;var b=window.XMLHttpRequest=function(t){var n=new p(t);try{u.emit("new-xhr",[n],n),n.addEventListener(v,o,!1)}catch(e){try{u.emit("internal-error",[e])}catch(r){}}return n};if(c(p,b),b.prototype=p.prototype,d.inPlace(b.prototype,["open","send"],"-xhr-",s),u.on("send-xhr-start",function(t,n){r(t,n),i(n)}),u.on("open-xhr-start",r),h){var x=m&&m.resolve();if(!w&&!m){var E=1,O=document.createTextNode(E);new h(a).observe(O,{characterData:!0})}}else f.on("fn-end",function(t){t[0]&&t[0].type===v||a()})},{}],10:[function(t,n,e){function r(t){var n=this.params,e=this.metrics;if(!this.ended){this.ended=!0;for(var r=0;r<d;r++)t.removeEventListener(u[r],this.listener,!1);if(!n.aborted){if(e.duration=a.now()-this.startTime,4===t.readyState){n.status=t.status;var i=o(t,this.lastSize);if(i&&(e.rxSize=i),this.sameOrigin){var c=t.getResponseHeader("X-NewRelic-App-Data");c&&(n.cat=c.split(", ").pop())}}else n.status=0;e.cbTime=this.cbTime,f.emit("xhr-done",[t],t),s("xhr",[n,e,this.startTime])}}}function o(t,n){var e=t.responseType;if("json"===e&&null!==n)return n;var r="arraybuffer"===e||"blob"===e||"json"===e?t.response:t.responseText;return h(r)}function i(t,n){var e=c(n),r=t.params;r.host=e.hostname+":"+e.port,r.pathname=e.pathname,t.sameOrigin=e.sameOrigin}var a=t("loader");if(a.xhrWrappable){var s=t("handle"),c=t(11),f=t("ee"),u=["load","error","abort","timeout"],d=u.length,l=t("id"),p=t(14),h=t(13),m=window.XMLHttpRequest;a.features.xhr=!0,t(9),f.on("new-xhr",function(t){var n=this;n.totalCbs=0,n.called=0,n.cbTime=0,n.end=r,n.ended=!1,n.xhrGuids={},n.lastSize=null,p&&(p>34||p<10)||window.opera||t.addEventListener("progress",function(t){n.lastSize=t.loaded},!1)}),f.on("open-xhr-start",function(t){this.params={method:t[0]},i(this,t[1]),this.metrics={}}),f.on("open-xhr-end",function(t,n){"loader_config"in NREUM&&"xpid"in NREUM.loader_config&&this.sameOrigin&&n.setRequestHeader("X-NewRelic-ID",NREUM.loader_config.xpid)}),f.on("send-xhr-start",function(t,n){var e=this.metrics,r=t[0],o=this;if(e&&r){var i=h(r);i&&(e.txSize=i)}this.startTime=a.now(),this.listener=function(t){try{"abort"===t.type&&(o.params.aborted=!0),("load"!==t.type||o.called===o.totalCbs&&(o.onloadCalled||"function"!=typeof n.onload))&&o.end(n)}catch(e){try{f.emit("internal-error",[e])}catch(r){}}};for(var s=0;s<d;s++)n.addEventListener(u[s],this.listener,!1)}),f.on("xhr-cb-time",function(t,n,e){this.cbTime+=t,n?this.onloadCalled=!0:this.called+=1,this.called!==this.totalCbs||!this.onloadCalled&&"function"==typeof e.onload||this.end(e)}),f.on("xhr-load-added",function(t,n){var e=""+l(t)+!!n;this.xhrGuids&&!this.xhrGuids[e]&&(this.xhrGuids[e]=!0,this.totalCbs+=1)}),f.on("xhr-load-removed",function(t,n){var e=""+l(t)+!!n;this.xhrGuids&&this.xhrGuids[e]&&(delete this.xhrGuids[e],this.totalCbs-=1)}),f.on("addEventListener-end",function(t,n){n instanceof m&&"load"===t[0]&&f.emit("xhr-load-added",[t[1],t[2]],n)}),f.on("removeEventListener-end",function(t,n){n instanceof m&&"load"===t[0]&&f.emit("xhr-load-removed",[t[1],t[2]],n)}),f.on("fn-start",function(t,n,e){n instanceof m&&("onload"===e&&(this.onload=!0),("load"===(t[0]&&t[0].type)||this.onload)&&(this.xhrCbStart=a.now()))}),f.on("fn-end",function(t,n){this.xhrCbStart&&f.emit("xhr-cb-time",[a.now()-this.xhrCbStart,this.onload,n],n)})}},{}],11:[function(t,n,e){n.exports=function(t){var n=document.createElement("a"),e=window.location,r={};n.href=t,r.port=n.port;var o=n.href.split("://");!r.port&&o[1]&&(r.port=o[1].split("/")[0].split("@").pop().split(":")[1]),r.port&&"0"!==r.port||(r.port="https"===o[0]?"443":"80"),r.hostname=n.hostname||e.hostname,r.pathname=n.pathname,r.protocol=o[0],"/"!==r.pathname.charAt(0)&&(r.pathname="/"+r.pathname);var i=!n.protocol||":"===n.protocol||n.protocol===e.protocol,a=n.hostname===document.domain&&n.port===e.port;return r.sameOrigin=i&&(!n.hostname||a),r}},{}],12:[function(t,n,e){function r(){}function o(t,n,e){return function(){return i(t,[f.now()].concat(s(arguments)),n?null:this,e),n?void 0:this}}var i=t("handle"),a=t(15),s=t(16),c=t("ee").get("tracer"),f=t("loader"),u=NREUM;"undefined"==typeof window.newrelic&&(newrelic=u);var d=["setPageViewName","setCustomAttribute","setErrorHandler","finished","addToTrace","inlineHit","addRelease"],l="api-",p=l+"ixn-";a(d,function(t,n){u[n]=o(l+n,!0,"api")}),u.addPageAction=o(l+"addPageAction",!0),u.setCurrentRouteName=o(l+"routeName",!0),n.exports=newrelic,u.interaction=function(){return(new r).get()};var h=r.prototype={createTracer:function(t,n){var e={},r=this,o="function"==typeof n;return i(p+"tracer",[f.now(),t,e],r),function(){if(c.emit((o?"":"no-")+"fn-start",[f.now(),r,o],e),o)try{return n.apply(this,arguments)}catch(t){throw c.emit("fn-err",[arguments,this,t],e),t}finally{c.emit("fn-end",[f.now()],e)}}}};a("setName,setAttribute,save,ignore,onEnd,getContext,end,get".split(","),function(t,n){h[n]=o(p+n)}),newrelic.noticeError=function(t){"string"==typeof t&&(t=new Error(t)),i("err",[t,f.now()])}},{}],13:[function(t,n,e){n.exports=function(t){if("string"==typeof t&&t.length)return t.length;if("object"==typeof t){if("undefined"!=typeof ArrayBuffer&&t instanceof ArrayBuffer&&t.byteLength)return t.byteLength;if("undefined"!=typeof Blob&&t instanceof Blob&&t.size)return t.size;if(!("undefined"!=typeof FormData&&t instanceof FormData))try{return JSON.stringify(t).length}catch(n){return}}}},{}],14:[function(t,n,e){var r=0,o=navigator.userAgent.match(/Firefox[\/\s](\d+\.\d+)/);o&&(r=+o[1]),n.exports=r},{}],15:[function(t,n,e){function r(t,n){var e=[],r="",i=0;for(r in t)o.call(t,r)&&(e[i]=n(r,t[r]),i+=1);return e}var o=Object.prototype.hasOwnProperty;n.exports=r},{}],16:[function(t,n,e){function r(t,n,e){n||(n=0),"undefined"==typeof e&&(e=t?t.length:0);for(var r=-1,o=e-n||0,i=Array(o<0?0:o);++r<o;)i[r]=t[n+r];return i}n.exports=r},{}],17:[function(t,n,e){n.exports={exists:"undefined"!=typeof window.performance&&window.performance.timing&&"undefined"!=typeof window.performance.timing.navigationStart}},{}],18:[function(t,n,e){function r(t){return!(t&&t instanceof Function&&t.apply&&!t[a])}var o=t("ee"),i=t(16),a="nr@original",s=Object.prototype.hasOwnProperty,c=!1;n.exports=function(t,n){function e(t,n,e,o){function nrWrapper(){var r,a,s,c;try{a=this,r=i(arguments),s="function"==typeof e?e(r,a):e||{}}catch(f){l([f,"",[r,a,o],s])}u(n+"start",[r,a,o],s);try{return c=t.apply(a,r)}catch(d){throw u(n+"err",[r,a,d],s),d}finally{u(n+"end",[r,a,c],s)}}return r(t)?t:(n||(n=""),nrWrapper[a]=t,d(t,nrWrapper),nrWrapper)}function f(t,n,o,i){o||(o="");var a,s,c,f="-"===o.charAt(0);for(c=0;c<n.length;c++)s=n[c],a=t[s],r(a)||(t[s]=e(a,f?s+o:o,i,s))}function u(e,r,o){if(!c||n){var i=c;c=!0;try{t.emit(e,r,o,n)}catch(a){l([a,e,r,o])}c=i}}function d(t,n){if(Object.defineProperty&&Object.keys)try{var e=Object.keys(t);return e.forEach(function(e){Object.defineProperty(n,e,{get:function(){return t[e]},set:function(n){return t[e]=n,n}})}),n}catch(r){l([r])}for(var o in t)s.call(t,o)&&(n[o]=t[o]);return n}function l(n){try{t.emit("internal-error",n)}catch(e){}}return t||(t=o),e.inPlace=f,e.flag=a,e}},{}],ee:[function(t,n,e){function r(){}function o(t){function n(t){return t&&t instanceof r?t:t?c(t,s,i):i()}function e(e,r,o,i){if(!l.aborted||i){t&&t(e,r,o);for(var a=n(o),s=h(e),c=s.length,f=0;f<c;f++)s[f].apply(a,r);var d=u[y[e]];return d&&d.push([g,e,r,a]),a}}function p(t,n){v[t]=h(t).concat(n)}function h(t){return v[t]||[]}function m(t){return d[t]=d[t]||o(e)}function w(t,n){f(t,function(t,e){n=n||"feature",y[e]=n,n in u||(u[n]=[])})}var v={},y={},g={on:p,emit:e,get:m,listeners:h,context:n,buffer:w,abort:a,aborted:!1};return g}function i(){return new r}function a(){(u.api||u.feature)&&(l.aborted=!0,u=l.backlog={})}var s="nr@context",c=t("gos"),f=t(15),u={},d={},l=n.exports=o();l.backlog=u},{}],gos:[function(t,n,e){function r(t,n,e){if(o.call(t,n))return t[n];var r=e();if(Object.defineProperty&&Object.keys)try{return Object.defineProperty(t,n,{value:r,writable:!0,enumerable:!1}),r}catch(i){}return t[n]=r,r}var o=Object.prototype.hasOwnProperty;n.exports=r},{}],handle:[function(t,n,e){function r(t,n,e,r){o.buffer([t],r),o.emit(t,n,e)}var o=t("ee").get("handle");n.exports=r,r.ee=o},{}],id:[function(t,n,e){function r(t){var n=typeof t;return!t||"object"!==n&&"function"!==n?-1:t===window?0:a(t,i,function(){return o++})}var o=1,i="nr@id",a=t("gos");n.exports=r},{}],loader:[function(t,n,e){function r(){if(!x++){var t=b.info=NREUM.info,n=l.getElementsByTagName("script")[0];if(setTimeout(u.abort,3e4),!(t&&t.licenseKey&&t.applicationID&&n))return u.abort();f(y,function(n,e){t[n]||(t[n]=e)}),c("mark",["onload",a()+b.offset],null,"api");var e=l.createElement("script");e.src="https://"+t.agent,n.parentNode.insertBefore(e,n)}}function o(){"complete"===l.readyState&&i()}function i(){c("mark",["domContent",a()+b.offset],null,"api")}function a(){return E.exists&&performance.now?Math.round(performance.now()):(s=Math.max((new Date).getTime(),s))-b.offset}var s=(new Date).getTime(),c=t("handle"),f=t(15),u=t("ee"),d=window,l=d.document,p="addEventListener",h="attachEvent",m=d.XMLHttpRequest,w=m&&m.prototype;NREUM.o={ST:setTimeout,SI:d.setImmediate,CT:clearTimeout,XHR:m,REQ:d.Request,EV:d.Event,PR:d.Promise,MO:d.MutationObserver};var v=""+location,y={beacon:"bam.nr-data.net",errorBeacon:"bam.nr-data.net",agent:"js-agent.newrelic.com/nr-1071.min.js"},g=m&&w&&w[p]&&!/CriOS/.test(navigator.userAgent),b=n.exports={offset:s,now:a,origin:v,features:{},xhrWrappable:g};t(12),l[p]?(l[p]("DOMContentLoaded",i,!1),d[p]("load",r,!1)):(l[h]("onreadystatechange",o),d[h]("onload",r)),c("mark",["firstbyte",s],null,"api");var x=0,E=t(17)},{}]},{},["loader",2,10,4,3]);</script>
    <title>Here's where Irma and the majority of hurricanes come from - Business Insider</title>
    <meta name="date" content="2017-09-08" />
<meta name="sailthru.date" content="2017-09-08" />
<meta name="news_keywords" content="Video, BI Original Video, TI Original Video, Hurrican Irma, Hurricane, Hurricane Harvey, Hurricane Harvey 2017, Hurricane Jose, Hurricane Jose 2017, Weather, Wind, Africa, Sahara, Sahara Desert, Meteorology, Atlantic, Atlantic Ocean, Florida, Gulf Coast, Gulf of Mexico, BI Animation, Rob Ludacer, Jessica Orwig" />
<meta name="sailthru.tags" content="Video, BI Original Video, TI Original Video, Hurrican Irma, Hurricane, Hurricane Harvey, Hurricane Harvey 2017, Hurricane Jose, Hurricane Jose 2017, Weather, Wind, Africa, Sahara, Sahara Desert, Meteorology, Atlantic, Atlantic Ocean, Florida, Gulf Coast, Gulf of Mexico, BI Animation, Rob Ludacer, Jessica Orwig" />
<meta name="description" content="Irma and Harvey were born half a world away." />
<meta name="sailthru.description" content="Irma and Harvey were born half a world away." />
<meta name="title" content="Most hurricanes that hit the US come from the same exact spot in the world" />
<meta name="sailthru.verticals" content="science,news,travel,bi-video" />
<meta name="sailthru.title" content="Most hurricanes that hit the US come from the same exact spot in the world" />
<meta name="tbi-image" content="http://static2.businessinsider.com/image/59b2e05c609c301b008b59f5/most-hurricanes-that-hit-the-us-come-from-the-same-exact-spot-in-the-world.jpg" />
<meta name="sailthru.image.full" content="http://static2.businessinsider.com/image/59b2e05c609c301b008b59f5/most-hurricanes-that-hit-the-us-come-from-the-same-exact-spot-in-the-world.jpg" />
<meta name="sailthru.image.thumb" content="http://static3.businessinsider.com/image/59b2e05c609c301b008b59f5-50-50/most-hurricanes-that-hit-the-us-come-from-the-same-exact-spot-in-the-world.jpg" />
<meta name="sailthru.author" content="Rob Ludacer" />
<meta name="sailthru.author" content="Rob Ludacer" />
<meta name="sailthru.author" content="Jessica Orwig" />
<meta property="og:title" content="Most hurricanes that hit the US come from the same exact spot in the world" />
<meta property="og:description" content="Irma and Harvey were born half a world away." />
<meta property="og:type" content="article" />
<meta property="og:url" content="http://www.businessinsider.com/what-causes-hurricanes-irma-harvey-jose-sahara-africa-easterly-atlantic-2017-9" />
<meta property="og:site_name" content="Business Insider" />
<meta property="fb:app_id" content="155043519637" />
<meta property="article:publisher" content="businessinsider" />
<meta property="author" content="Rob Ludacer and Jessica Orwig" />
<meta name="twitter:url" content="http://www.businessinsider.com/what-causes-hurricanes-irma-harvey-jose-sahara-africa-easterly-atlantic-2017-9" />
<meta name="twitter:title" content="Most hurricanes that hit the US come from the same exact spot in the world" />
<meta name="twitter:description" content="Irma and Harvey were born half a world away." />
<meta name="twitter:card" content="player" />
<meta property="twitter:player" content="https://player.ooyala.com/static/v4/stable/4.4.11/skin-plugin/iframe.html?ec=&amp;pbid=6e12e8b3387a44daacfb73afba25a76e&amp;pcode=BhdmY6l9g002rBhQ6aEBZiheacDu" />
<meta property="twitter:player:width" content="435" />
<meta property="twitter:player:height" content="251" />
<meta property="twitter:player:stream" content="https://player.ooyala.com/static/v4/stable/4.4.11/skin-plugin/iframe.html?ec=&amp;pbid=6e12e8b3387a44daacfb73afba25a76e&amp;pcode=BhdmY6l9g002rBhQ6aEBZiheacDu" />
<meta property="twitter:player:stream:content_type" content="video/mp4; codecs=avc1.42E01E, mp4a.40.2" />
<meta property="twitter:image" content="http://static6.businessinsider.com/image/59b2e062609c3064468b4fb5-506-253/most-hurricanes-that-hit-the-us-come-from-the-same-exact-spot-in-the-world.jpg" />
<meta name="twitter:creator" content="@robludacer" />
<meta name="twitter:site" content="SciInsider" />
<meta property="article:author" content="http://www.businessinsider.com/author/jessica-orwig" />
<meta property="og:image" content="http://static6.businessinsider.com/image/59b2e062609c3064468b4fb5-1190-625/most-hurricanes-that-hit-the-us-come-from-the-same-exact-spot-in-the-world.jpg" />    
<link rel="canonical" href="http://www.businessinsider.com/what-causes-hurricanes-irma-harvey-jose-sahara-africa-easterly-atlantic-2017-9">
<link rel="alternate" href="http://uk.businessinsider.com/what-causes-hurricanes-irma-harvey-jose-sahara-africa-easterly-atlantic-2017-9" hreflang="en-GB">
<link rel="alternate" href="http://www.businessinsider.com/what-causes-hurricanes-irma-harvey-jose-sahara-africa-easterly-atlantic-2017-9" hreflang="en-US">
<link rel="alternate" href="http://www.businessinsider.com/what-causes-hurricanes-irma-harvey-jose-sahara-africa-easterly-atlantic-2017-9" hreflang="x-default">
    <link href="http://static2.businessinsider.com/assets/css/min-base-us.css?1518460446" media="screen" rel="stylesheet" type="text/css" />
<link href="http://static1.businessinsider.com/assets/css/min-post-us.css?1518460446" media="screen" rel="stylesheet" type="text/css" />
<link rel="syndication-source" />
<link href="https://amp.businessinsider.com/what-causes-hurricanes-irma-harvey-jose-sahara-africa-easterly-atlantic-2017-9" rel="amphtml" />    <link type="text/css" rel="stylesheet" media="print" href="http://static4.businessinsider.com/assets/css/print.css?1518460446" />

    <!-- detect adblock users for Piano and set cookie appropriately -->
    <script>

    // CustomEvent polyfill
    (function () {

      if ( typeof window.CustomEvent === "function" ) return false;

      function CustomEvent ( event, params ) {
        params = params || { bubbles: false, cancelable: false, detail: undefined };
        var evt = document.createEvent( 'CustomEvent' );
        evt.initCustomEvent( event, params.bubbles, params.cancelable, params.detail );
        return evt;
       }

      CustomEvent.prototype = window.Event.prototype;

      window.CustomEvent = CustomEvent;
    })();

    var setAdblockerCookie = function(adblocker) {
        var d = new Date();
        d.setTime(d.getTime() + 60 * 60 * 24 * 30 * 1000);
        document.cookie = "__adblocker=" + (adblocker ? "true" : "false") + "; expires=" + d.toUTCString() + "; path=/";

        var event = new CustomEvent('piano_set', {'detail' : adblocker});
        document.dispatchEvent(event);
    }

    var script = document.createElement("script");
    script.setAttribute("async", true);
    script.setAttribute("src", "//www.npttech.com/advertising.js");
    script.setAttribute("onerror", "setAdblockerCookie(true);");
    script.setAttribute("onload", "setAdblockerCookie(false);");
    document.getElementsByTagName("head")[0].appendChild(script);
    </script>

    <!-- Krux - Control Tag- Start -->
    <!-- BEGIN Krux ControlTag for "businessinsider.com" -->
<script class="kxct" data-id="I2I9M2yx" data-timing="async" data-version="3.0" type="text/javascript">
  window.Krux||((Krux=function(){Krux.q.push(arguments)}).q=[]);
  (function(){
    var k=document.createElement('script');k.type='text/javascript';k.async=true;
    k.src=(location.protocol==='https:'?'https:':'http:')+'//cdn.krxd.net/controltag/I2I9M2yx.js';
    var s=document.getElementsByTagName('script')[0];s.parentNode.insertBefore(k,s);
  }());
</script>
<!-- END Krux ControlTag -->    <!-- Krux - Control Tag- End -->

    <!-- Krux - Start -->
    <script class="kxint" type="text/javascript">
      window.Krux||((Krux=function(){Krux.q.push(arguments);}).q=[]);
      (function(){
        function retrieve(n){
          var m, k='kx'+n,ls=(function(){
              try{
                return window.localStorage;
              }catch(e){
                return null;
              }
            })();
          if (ls) {
              return ls[k] || "";
          } else if (navigator.cookieEnabled) {
              m = document.cookie.match(k+'=([^;]*)');
              return (m && unescape(m[1])) || "";
          } else {
              return '';
          }
        }

        Krux.user = retrieve('user');
        Krux.segments = retrieve('segs') ? retrieve('segs').split(',') : [];
      })();
    </script>
    <!-- Krux - End -->

    <script type="text/javascript">
    	var vertical = 'science';
        var index_ad_hierarch = 'tech/science';
        var jw_header_bids_id = 180160;

        window.headertag = window.headertag || {};
        var PageType = window.headertag.pagetype = "video";

        var post_id = '';
        var _sf_startpt=(new Date()).getTime();
    </script>

    <!-- load GPT- start -->
    <script type="text/javascript">
        function loadScript(scriptSrc) {
            var script = document.createElement('script');
            script.async=true;
            script.type = 'text/javascript';
            script.src = scriptSrc;
            var node = document.getElementsByTagName('script')[0];
            node.parentNode.insertBefore(script, node);
        }
        loadScript('//www.googletagservices.com/tag/js/gpt.js');
        var googletag = googletag || {};
        googletag.cmd = googletag.cmd || [];
        googletag.cmd.push(function() {
            //googletag.pubads().disableInitialLoad();
            //googletag.enableServices();
         });
    </script>
    <!-- load GPT- end -->

    <!-- load + init APSTAG - start -->
    <script type="text/javascript">
        /* ----- Begin Step 1 ----- */
        //Load the APS JavaScript Library
        !function(a9,a,p,s,t,A,g){if(a[a9])return;function q(c,r){a[a9]._Q.push([c,r])}a[a9]={init:function(){q("i",arguments)},fetchBids:function(){q("f",arguments)},setDisplayBids:function(){},targetingKeys:function(){return[]},_Q:[]};A=p.createElement(s);A.async=!0;A.src=t;g=p.getElementsByTagName(s)[0];g.parentNode.insertBefore(A,g)}("apstag",window,document,"script","//c.amazon-adsystem.com/aax2/apstag.js");
        //Initialize the Library
        apstag.init({
             pubID: '3201',
             adServer: 'googletag'
        });
        /* ----- End Step 1 ----- */
    </script>
    <!-- load + init APSTAG - end -->

    <!-- Index Exchange - start -->
                <script type="text/javascript" src="http://js.indexww.com/ht/ls-business-insider.js" async></script>
        <!-- Index Exchange - end -->

    <script type="text/javascript">
        //this should be refactored to the BI.Google_Plus object, however the BI core library will need to be moved to above the headScript call
        window.gPlusConfigs = {client_id : '551214076990-h27puiaonnlg9a9772gq3qbe9nk6qnno.apps.googleusercontent.com', base_domain: 'businessinsider.com'};
    </script>

    <!-- IAS -->
    <script type="text/javascript">
        window.BI_adHierarchy = 'desktop/tech/science/video';
    </script>
    <!-- IAS end -->

    <script type="text/javascript" src="http://code.jquery.com/jquery-1.7.1.min.js"></script>
<script type="text/javascript" src="http://static4.businessinsider.com/assets/js/min2.js?1518460446"></script>
<script type="application/ld+json">
    //<![CDATA[
    {"@context":"http:\/\/schema.org","@type":"VideoObject","name":"Most hurricanes that hit the US come from the same exact spot in the world","contentUrl":"http:\/\/www.businessinsider.com\/what-causes-hurricanes-irma-harvey-jose-sahara-africa-easterly-atlantic-2017-9","description":"As Hurricane Irma bears down on the East coast...","thumbnailUrl":"http:\/\/static2.businessinsider.com\/image\/59b2e05c609c301b008b59f5\/most-hurricanes-that-hit-the-us-come-from-the-same-exact-spot-in-the-world.jpg","embedUrl":"<iframe width=\u0027640\u0027 height=\u0027480\u0027 frameborder=\u00270\u0027 allowfullscreen src=\u0027\/\/player.ooyala.com\/static\/v4\/stable\/latest\/skinplugin\/iframe.html?ec=BhdmY6l9g002rBhQ6aEBZiheacDu.zB1Za&pbid=6e12e8b3387a44daacfb73afba25a76e&pcode=BhdmY6l9g002rBhQ6aEBZiheacDu<\/iframe>\u0027","uploadDate":"2017-09-08T18:25:38Z"}    //]]>
</script>
<script type="text/javascript">
    //<![CDATA[
    BI.post.isSlideshow=false;    //]]>
</script>
<script type="text/javascript">
    //<![CDATA[
    post = {"id":"59b2b8de45e2381e008b585a","uri":"http:\/\/www.businessinsider.com\/what-causes-hurricanes-irma-harvey-jose-sahara-africa-easterly-atlantic-2017-9","thumb":"http:\/\/static4.businessinsider.com\/image\/59b2e05c609c301b008b59f5-90-90\/most-hurricanes-that-hit-the-us-come-from-the-same-exact-spot-in-the-world.jpg","author":"Rob Ludacer|Jessica Orwig","author_ids":"Jessica Orwig:4k|Rob Ludacer:6e","post_type":"post"};    //]]>
</script>
<script type="text/javascript">
    //<![CDATA[
    
        Author = "Rob Ludacer|Jessica Orwig";
        Category = "Video|BI Original Video|TI Original Video|Hurrican Irma|Hurricane|Hurricane Harvey|Hurricane Harvey 2017|Hurricane Jose|Hurricane Jose 2017|Weather|Wind|Africa|Sahara|Sahara Desert|Meteorology|Atlantic|Atlantic Ocean|Florida|Gulf Coast|Gulf of Mexico|BI Animation";
        AuthorType = "Staff";
        OriginalID = "";
        Editor = "Jessica Orwig";
        BIISub = "none"
            //]]>
</script>
<script type="text/javascript">
    //<![CDATA[
    
        BI.nav_select = "Tech";
        BI.highTrafficMode = 0;
        BI.post.isDraft = 0;
        BI.post.url = "http://www.businessinsider.com/what-causes-hurricanes-irma-harvey-jose-sahara-africa-easterly-atlantic-2017-9";
        BI.post.name = "what-causes-hurricanes-irma-harvey-jose-sahara-africa-easterly-atlantic-2017-9";
        BI.post.vertical =  "science";
        BI.post.author =  ["Rob Ludacer","Jessica Orwig"];
        BI.post.categories =  ["Video","BI Original Video","TI Original Video","Hurrican Irma","Hurricane","Hurricane Harvey","Hurricane Harvey 2017","Hurricane Jose","Hurricane Jose 2017","Weather","Wind","Africa","Sahara","Sahara Desert","Meteorology","Atlantic","Atlantic Ocean","Florida","Gulf Coast","Gulf of Mexico","BI Animation"];
        BI.post.views =  39052;
        BI.comments.currentPage = 0;
        BI.comments.filterPundits = 1;
        BI.comments.getAllComments = 1;
            //]]>
</script>
    <!-- purrrf performance library reference point -->
    <script type="text/javascript">
        window._purrrf.setStart();
    </script>

    <!-- Video Scripts -->
            <!-- JW Player Head -->
        <script src="http://imasdk.googleapis.com/js/sdkloader/ima3.js"></script>
        <script src="//content.jwplatform.com/libraries/puACk8ZV.js"></script>
        <!-- /JW Player Head -->
    
    <!-- optimizely desktop -->
        <!-- End optimizely desktop -->
    <!--Tech Insider Pinterest-->
    
    <!-- Facebook Instant Start -->
    <meta property="fb:pages" content="20446254070" />
    <!-- Facebook Instant Start -->
    
    
    <meta name="tbi-vertical" content="science" />
    <meta name="viewport" content="width=1024" />

    <!--[if gte IE 9]>
    <style type="text/css">
        .gradient {
            filter: none;
        }
    </style>
    <![endif]-->

    <!--[if lt IE 9]>
        <link type="text/css" rel="stylesheet" media="all" href="http://static5.businessinsider.com/assets/css/ie8.css" />
        <script src="http://html5shim.googlecode.com/svn/trunk/html5.js"></script>
        <script type="text/javascript" src="http://static3.businessinsider.com/assets/js/vendor/ie8/placeholders.min.js"></script>
    <![endif]-->

    <!--[if IE 9]>
        <link type="text/css" rel="stylesheet" media="all" href="http://static4.businessinsider.com/assets/css/ie9.css" />
        <script type="text/javascript" src="http://static5.businessinsider.com/assets/js/shims/Element.classList.js"></script>
    <![endif]-->

    <!--Tech Insider if IE 9 -->
    
    <link rel="alternate" type="application/rss+xml" title="RSS" href="http://feeds.feedburner.com/businessinsider/science" />

    <link rel="apple-touch-icon" sizes="180x180" href="http://static4.businessinsider.com/assets/images/us/favicons/apple-touch-icon.png?v=BI-US-2017-06-22" />
<link rel="icon" type="image/png" sizes="32x32" href="http://static1.businessinsider.com/assets/images/us/favicons/favicon-32x32.png?v=BI-US-2017-06-22" />
<link rel="icon" type="image/png" sizes="16x16" href="http://static5.businessinsider.com/assets/images/us/favicons/favicon-16x16.png?v=BI-US-2017-06-22" />
<link rel="manifest" href="http://static5.businessinsider.com/assets/images/us/favicons/manifest.json?v=BI-US-2017-06-22" />
<link rel="mask-icon" href="http://static6.businessinsider.com/assets/images/us/favicons/safari-pinned-tab.svg?v=BI-US-2017-06-22" color="#1D607C" />
<link rel="shortcut icon" href="http://static3.businessinsider.com/assets/images/us/favicons/favicon.ico?v=BI-US-2017-06-22" />
<meta name="msapplication-config" content="http://static2.businessinsider.com/assets/images/us/favicons/browserconfig.xml?v=BI-US-2017-06-22" />
<meta name="theme-color" content="#1D607C" />
<meta name="linkedin:owner" content="mid:1d5f7b" />

    <!--[if gte IE 9]>
        <meta name="application-name" content="Business Insider - science"/>
        <meta name="msapplication-tooltip" content="Start the page in Site Mode"/>
        <meta name="msapplication-starturl" content="http://www.businessinsider.com/science"/>
        <meta name="msapplication-window" content="width=800;height=600"/>
        <meta name="msapplication-navbutton-color" content="#4C7C8D"/>

        <meta name="msapplication-task" content="name=Tech;action-uri=http://www.businessinsider.com/sai;icon-uri=http://www.businessinsider.com/favicon.ico"/>
        <meta name="msapplication-task" content="name=Media;action-uri=http://www.businessinsider.com/thewire;icon-uri=http://www.businessinsider.com/favicon.ico"/>
        <meta name="msapplication-task" content="name=Wall Street;action-uri=http://www.businessinsider.com/clusterstock;icon-uri=http://www.businessinsider.com/favicon.ico"/>
        <meta name="msapplication-task" content="name=Markets;action-uri=http://www.businessinsider.com/moneygame;icon-uri=http://www.businessinsider.com/favicon.ico"/>
        <meta name="msapplication-task" content="name=Strategy;action-uri=http://www.businessinsider.com/warroom;icon-uri=http://www.businessinsider.com/favicon.ico"/>
    <![endif]-->

    <script type="text/javascript">BI.site = 'US';</script>
    <script type="text/javascript">BI.siteURI = 'http://www.businessinsider.com';</script>
    <script type="text/javascript">BI.secureURI = 'https://www.businessinsider.com';</script>
    <script type="text/javascript">BI.staticURI = 'http://static1.businessinsider.com';</script>
    <script type="text/javascript">BI.env.setDomain('http://www.businessinsider.com');</script>
    <script type="text/javascript">BI.sailthruHorizonURI = 'horizon.businessinsider.com';</script>

            <!-- *************** ANALYTICS *************** -->
    <script>
        BI.ANALYTICS_SERVICE_URL = '//analytics.businessinsider.com';
    </script>
    <!-- *************** END ANALYTICS *************** -->
    
        <script type="text/javascript">BI.vertical='Science';</script>
    <script type="text/javascript">BI.ads = { slots: [], queue: [] };</script>
    <script type="text/javascript">BI.configs.ads.post_load_ad_buffer= 50;</script>
    <script type="text/javascript">BI.configs.ads.subnav_sticky_ad_buffer = 250;</script>
    <script type="text/javascript">
        BI.flags = BI.flags || {};
        BI.flags.bii_facebook_tracking = 1;
        BI.flags.bii_facebook_tracking_verticals = ["Apps and Platforms","Digital Media","Payments","Internet of Things","E-Commerce","eCommerce","Fintech"];
    </script>


    
    <script src="https://www.google.com/recaptcha/api.js" async defer></script>

    <script type="text/javascript" src="//platform.linkedin.com/in.js" async defer>
       api_key: x4dbohswv62d
       authorize: true
       scope: r_basicprofile r_emailaddress w_share
    </script>

<!-- Taboola head -->

        <!-- Standard Taboola Script -->
        <script type="text/javascript">
            window._taboola = window._taboola || [];
            _taboola.push({video:'auto'});
            !function (e, f, u) {
                e.async = 1;
                e.src = u;
                f.parentNode.insertBefore(e, f);
            }(
                document.createElement('script'),
                document.getElementsByTagName('script')[0],
                'http://cdn.taboola.com/libtrc/businessinsider/loader.js'
            );
        </script>
<!-- / Taboola head -->

<!-- Pinterest JS -->
<script type="text/javascript">
(function(d){
    var f = d.getElementsByTagName('SCRIPT')[0], p = d.createElement('SCRIPT');
    p.type = 'text/javascript';
    p.async = true;
    p.defer = true;
    p.src = '//assets.pinterest.com/js/pinit.js';
    f.parentNode.insertBefore(p, f);
}(document));
</script>
<!-- / Pinterest JS -->

<!-- Piano -->

    
    <script>
        // Piano: custom vars
        tp = window.tp || [];
        tp.push(["setUseTinypassAccounts", true ]);
        tp.push(['setCustomVariable', 'PageType', PageType]);
        tp.push(["setAid", 'B6sIXKLiin']);

        tp.push(["setSandbox", false]);

        (function(src){var a=document.createElement("script");a.type="text/javascript";a.async=true;a.src=src;var b=document.getElementsByTagName("script")[0];b.parentNode.insertBefore(a,b)})("//cdn.tinypass.com/api/tinypass.min.js");

        tp.push(['init', function () {
            tp.experience.init();
        }]);

        // refresh on login
        tp.push(["addHandler", "loginSuccess", function(){
            tp.api.callApi('/access/list', {}, function(data){
                if (typeof data.data != "undefined"){
                    for ( var i in data.data ){
                        // If user has access to something
                        if ( data.data[i].granted ){
                            tp.offer.close();
                            location.reload();
                        }
                    }
                }
            });
        }]);

                    // post vars
            tp.push(['setTags', ["Video","BI Original Video","TI Original Video","Hurrican Irma","Hurricane","Hurricane Harvey","Hurricane Harvey 2017","Hurricane Jose","Hurricane Jose 2017","Weather","Wind","Africa","Sahara","Sahara Desert","Meteorology","Atlantic","Atlantic Ocean","Florida","Gulf Coast","Gulf of Mexico","BI Animation"]]);
            tp.push(['setCustomVariable', 'PrimaryVertical', 'science']);

                        tp.push(['setCustomVariable', 'SecondaryVertical_News', 1]);
                        tp.push(['setCustomVariable', 'SecondaryVertical_Travel', 1]);
                        tp.push(['setCustomVariable', 'SecondaryVertical_Bi-video', 1]);
            
            BI.post.categories.forEach(function(val, index){
                var tmp = val.replace(/[\s()&\[\]\-']/g, "");
                tp.push(['setCustomVariable', 'Category_' + tmp, 1]);
            });
        
        // Get current page location and store as cookie
        var primeReferrer = window.location.href;
        BI.cookies.set('__pref', primeReferrer, 2592e3);
    </script>

<!-- / PIANO -->

<!-- Chartbeat -->
    <script type="text/javascript">
        // chartbeat wants the vars in global
        window._sf_async_config = window._sf_async_config || {};
        window._sf_async_config.uid = 14447;
        window._sf_async_config.domain = 'businessinsider.com';
        window._sf_async_config.flickerControl = false;
        window._sf_async_config.useCanonical = false;
        window._sf_startpt = (new Date()).getTime();
    </script>
    <script async src="https://static.chartbeat.com/js/chartbeat_mab.js"></script>
<!-- / Chartbeat -->


<!-- Ad header bidding prefetch data -->
<script>
    (function() {
        // TODO: move this to a config?
                function str2Array(s) {
            var sizes = s.split(',');
            sizes.forEach(function(value, key) {
                sizes[key] = value.split('x');

                // Convert each value to an integer, as required by DFP
                sizes[key].forEach(function(value2, key2) {
                    // If it's not a number then it's likely 'fluid'
                    if (isNaN(parseInt(value2, 10))) {
                        sizes[key] = value2;
                    } else {
                        sizes[key][key2] = parseInt(value2, 10);
                    }
                });
            });

            return sizes;
        }

                            BI.ads.slots['Lower 300'] = []; // make it an array of objects so we can support multiple slot of same region name
            BI.ads.slots['Lower 300'][0] = {"adunit":"desktop\/tech\/science\/video","authors":"rob-ludacer,jessica-orwig","pagetype":"video","region":"Lower 300","sizes":"300x250,300x600","tag":"shooting","url":"\/what-causes-hurricanes-irma-harvey-jose-sahara-africa-easterly-atlantic-2017-9","views":"10001-500000","responsive":"null"};
            BI.ads.slots['Lower 300'][0]['_id'] = 'ad-' + BI.UUID.get();
            BI.ads.slots['Lower 300'][0].sizes =  str2Array(BI.ads.slots['Lower 300'][0].sizes);
            BI.ads.slots['Lower 300'][0]['preload'] = true;
        
        var prefetchedSlots = [];

        for (var region in BI.ads.slots) {
            if (BI.ads.slots.hasOwnProperty(region)) {
                // push amazon style slot object to an array
                prefetchedSlots.push({
                    slotID      : BI.ads.slots[region][0]['_id'],
                    slotName    : BI.ads.slots[region][0].adunit,
                    sizes       : BI.ads.slots[region][0].sizes
                });
            }
        }

        BI.ads['apstag_bids'] = false;

        apstag.fetchBids({
            slots : prefetchedSlots,
            timeout: 500
        }, function(bids) {
            BI.ads['apstag_bids'] = true;
            BI.ads.queue.forEach(function(obj) {
                googletag.cmd.push(function(){
                    console.log('header setDisplayBids + display', obj.id);
                    apstag.setDisplayBids([obj.id]);
                    googletag.display(obj.id);
                });
            });

            // clear the queue
            BI.ads.queue = [];
        });
    })()
</script>
<!-- / Ad header bidding prefetch data -->

</head>


<body class="responsive ">

<div data-cookie-notice-container></div>
<!-- print only -->
<img class="print" src="http://static2.businessinsider.com/assets/images/us/logos/logo-print-v1.png" />

<!-- FB Connect -->
<div id="fb-root" data-bi-facebook-root="155043519637"></div>
<!-- / FB Connect -->

<!--[if lt IE 9]>
    <div class="container>
        <div class="row">
            <div class="alert alert-error alert-block">
                <h4>Warning!</h4>
                You are using an outdated version of Internet Explorer.  For security reasons you should <a href="http://windows.microsoft.com/en-us/internet-explorer/download-ie" target="_blank" title="Upgrade IE">upgrade your browser</a>. Please go to Windows Updates and install the latest version.
            </div>
        </div>
    </div>
<![endif]-->

<!-- masthead -->
<div class="masthead redesign">
    <div class="container masthead-container redesign">
        <div class="masthead-row redesign">
                            <!-- Redesign masthead -->
                <a href="/" class="logo redesign" title="Business Insider">
                    <svg class="svg-icon logo-BI-icon" aria-labelledby="title desc" role="img" viewBox="0 0 103 33" xmlns="http://www.w3.org/2000/svg"><title id="title">Business Insider Logo</title><desc id="desc">Logo for Business Insider over a transparent background.</desc><g class="logo-BI" fill-rule="evenodd"><path d="M7.984 32h2.396V19.2H7.984zM16.767 31.808h2.146v-8.076L27.946 32V19.392h-2.14v7.938l-9.039-8.13zM32.845 28.708c1.168.91 2.57 1.436 4.073 1.436 1.464 0 2.491-.504 2.491-1.617 0-.97-.655-1.35-1.802-1.775l-1.857-.645c-1.712-.608-3.014-1.496-3.014-3.537 0-2.183 1.971-3.37 4.328-3.37 1.444 0 2.76.363 3.788 1.006v2.165c-1.069-.79-2.239-1.334-3.742-1.334-1.294 0-2.261.483-2.261 1.49 0 .91.607 1.274 1.676 1.64l2.069.726c2.005.705 2.925 1.798 2.925 3.596 0 2.262-1.99 3.511-4.601 3.511-1.716 0-3.175-.48-4.073-1.086v-2.206zM47.109 32h2.395V19.2h-2.395zM60.74 30.063c2.7 0 4.143-1.732 4.143-4.466 0-2.754-1.444-4.48-4.143-4.48h-2.67v8.946h2.67zM55.89 19.2h4.93c3.795 0 6.249 2.5 6.249 6.397 0 3.9-2.454 6.403-6.249 6.403h-4.93V19.2zM79.047 19.2v1.917H73.25v3.08h5.199v1.895h-5.2v3.971h5.798V32h-7.985V19.2zM87.549 24.996h2.377c1.407 0 2.2-.772 2.2-1.959s-.793-1.96-2.2-1.96h-2.377v3.92zm0 1.81V32h-2.115V19.2h4.532c2.584 0 4.256 1.331 4.256 3.837 0 2.143-.928 3.374-2.905 3.69L95.814 32h-2.406l-4.354-5.193H87.55zM7.147 6.59c.937-.343 1.667-1.372 1.667-2.787 0-2.358-1.667-3.58-4.334-3.58H0v13.163h4.896c2.667 0 4.334-1.308 4.334-3.773 0-1.394-.875-2.616-2.083-3.023zm-5.043-.836V2.153H4.46c1.48 0 2.271.536 2.271 1.779 0 1.243-.792 1.822-2.271 1.822H2.104zm0 1.844h2.75c1.46 0 2.251.728 2.251 1.929 0 1.179-.792 1.93-2.25 1.93h-2.75v-3.86zM19.005 13.6c3.063 0 5.126-1.844 5.126-5.445V.223h-2.167v7.674c0 2.53-1.042 3.71-2.959 3.71s-2.958-1.18-2.958-3.71V.223H13.88v7.91c0 3.623 2.083 5.467 5.125 5.467zm10.228-1.158c.896.644 2.355 1.158 4.063 1.158 2.605 0 4.584-1.33 4.584-3.73 0-1.908-.916-3.066-2.917-3.816l-2.062-.772c-1.063-.385-1.667-.771-1.667-1.736 0-1.072.958-1.586 2.25-1.586 1.5 0 2.667.578 3.73 1.415V1.08C36.193.395 34.88.009 33.442.009c-2.354 0-4.313 1.265-4.313 3.58 0 2.165 1.292 3.108 3 3.751l1.855.686c1.146.45 1.792.858 1.792 1.887 0 1.179-1.021 1.715-2.48 1.715-1.5 0-2.896-.558-4.063-1.522v2.336zM45.623.223h-2.166v13.162h2.166V.223zm6.182 13.146h2.088V4.806l8.788 8.767V.203h-2.082V8.62L51.805 0v13.369zM76.222.226v1.971h-5.626v3.168h5.045v1.949h-5.045v4.083h5.626v1.992h-7.75V.226h7.75zm5.045 12.207c.896.644 2.354 1.158 4.063 1.158 2.604 0 4.584-1.329 4.584-3.73 0-1.908-.917-3.065-2.917-3.816l-2.063-.771c-1.063-.386-1.667-.772-1.667-1.737 0-1.072.958-1.586 2.25-1.586 1.5 0 2.667.579 3.73 1.415V1.072C88.226.386 86.913 0 85.475 0c-2.354 0-4.313 1.265-4.313 3.58 0 2.165 1.292 3.108 3 3.751l1.855.686c1.146.45 1.792.858 1.792 1.887 0 1.179-1.02 1.715-2.48 1.715-1.5 0-2.896-.557-4.062-1.522v2.336zm13.086 0c.896.644 2.355 1.158 4.063 1.158 2.605 0 4.584-1.329 4.584-3.73 0-1.908-.917-3.065-2.917-3.816l-2.063-.771c-1.062-.386-1.667-.772-1.667-1.737 0-1.072.959-1.586 2.25-1.586 1.5 0 2.668.579 3.73 1.415V1.072C101.313.386 100 0 98.562 0c-2.355 0-4.313 1.265-4.313 3.58 0 2.165 1.292 3.108 3 3.751l1.855.686c1.146.45 1.792.858 1.792 1.887 0 1.179-1.021 1.715-2.48 1.715-1.5 0-2.896-.557-4.063-1.522v2.336z"/></g></svg>
                </a>

                <section class="masthead-verticals-wrapper">
                    <!-- Tech Finance Politics Strategy Life Video All -->
                    <ul class="verticals">
                                                                                    <li class="vertical-list-item redesign active">
                                                                <a class="vertical-anchor-redesign" href="/sai">
                                        Tech                                    </a>
                                </li>

                                                                                    <li class="vertical-list-item redesign ">
                                                                <a class="vertical-anchor-redesign" href="/clusterstock">
                                        Finance                                    </a>
                                </li>

                                                                                    <li class="vertical-list-item redesign ">
                                                                <a class="vertical-anchor-redesign" href="/politics">
                                        Politics                                    </a>
                                </li>

                                                                                    <li class="vertical-list-item redesign ">
                                                                <a class="vertical-anchor-redesign" href="/warroom">
                                        Strategy                                    </a>
                                </li>

                                                                                    <li class="vertical-list-item redesign ">
                                                                <a class="vertical-anchor-redesign" href="/thelife">
                                        Life                                    </a>
                                </li>

                                                                                    <li class="vertical-list-item redesign ">
                                                                <a class="vertical-anchor-redesign" href="/all">
                                        All                                    </a>
                                </li>

                                            </ul>
                </section>

                <section class="masthead-icons-wrapper">
                                        <!-- User menubar include -->
                    <span data-bi-ajax-route="/esi/user_menubar?0=json%3A%7B%22viking%22%3Atrue%7D&1=video"></span>                </section>

                    </div>
    </div>
    <!-- Search Area -->
    <div data-search-over class="nav-over transition">
        <div class="container transition search">
            <form method="get" action="/s" class="search-field">
                <input data-search-input name="q" type="text" placeholder="Search" autocomplete="off">
            </form>
        </div>
    </div>
    <!-- Nav area -->
            <div data-nav-over class="nav-over transition">
    
        <div class="transition">
            <div class="list-pipes nav-sections">
                <ul class="verticals">

                    
                                            <li class="active">
                                                <a class="item vertical-anchor" data-dropdown-id="dropdown-Tech" href="/sai">
                                Tech                            </a>
                        </li>

                    
                                            <li>
                                                <a class="item vertical-anchor" data-dropdown-id="dropdown-Finance" href="/clusterstock">
                                Finance                            </a>
                        </li>

                    
                                            <li>
                                                <a class="item vertical-anchor" data-dropdown-id="dropdown-Politics" href="/politics">
                                Politics                            </a>
                        </li>

                    
                                            <li>
                                                <a class="item vertical-anchor" data-dropdown-id="dropdown-Strategy" href="/warroom">
                                Strategy                            </a>
                        </li>

                    
                                            <li>
                                                <a class="item vertical-anchor" data-dropdown-id="dropdown-Life" href="/thelife">
                                Life                            </a>
                        </li>

                    
                                            <li>
                                                <a class="item vertical-anchor" data-dropdown-id="dropdown-All" href="/all">
                                All                            </a>
                        </li>

                                    </ul>
            </div>
                            <div class="main-nav-dropdown ks-nav-dropdown"></div>
                    </div>
    </div>
</div>

<!-- / masthead -->




<div id="main-content" class="redesign">
                
    <div class="container">
        <!-- flash messages -->
                <div class="siteskin-dropshadow">
            <div class="row primary-row">
                                    <div class="breaking-module-rendered" id="breaking-module-rendered">
                        <div class="page-top page-top-video">
                        <span data-bi-ajax-route="/esi/breaking_module"></span>                        </div>
                    </div>
                                <div class="span12 no-rightrail">
                    <div class="breaking-module-siteskin" id="breaking-module-siteskin"></div>
    
<a name="post-top"></a>

<div id="share-email-tmpl">
  <div id="shareEmailModal" class="modal hide fade" tabindex="-1" role="dialog" aria-labelledby="shareEmailModalLabel" aria-hidden="true">
    <div class="modal-header">
      <button type="button" class="close" data-dismiss="modal" aria-hidden="true">Ã</button>
      <h3 id="shareEmailModalLabel"></h3>
    </div>
  
    <div class="modal-body">
      <div class="share-email-error alert alert-error"></div>

      <div class="share-email-body">
        <div class="register">
          <form id="form_form" class="form-horizontal share-email-form" action="#" method="post">
            <div class="control-group">
              <label for="mail_from" class="control-label">From</label>

              <div class="controls">
                <input type="text" name="mail_from" class="mail-from share-email-input" placeholder="Your Email Address" />
              </div>
            </div>
              
            <div class="control-group">
              <label for="mail_to" class="control-label">To</label>

              <div class="controls">
                <input type="text" name="mail_to" class="mail-to share-email-input" placeholder="Friend's Email Address" />
              </div>
            </div>
              
            <div class="share-email-captcha-container">
              <div class="g-recaptcha" data-sitekey="6Lci0AUAAAAAALxy_wOu05bblbmrVjz8L7HU3d4S"></div>            </div>
              
            <input type="hidden" name="action" value="email" />
              
            <div class="control-group">
              <div class="controls share-email-submit-container">
                <input type="submit" class="btn submit email-post" value="Send" />
              </div>
            </div>
          </form>
        </div>
      </div>

      <div class="share-email-success" style="display:none">
        <div class="alert alert-success">
          You have successfully emailed the post.
        </div>
      </div>
    </div>
  </div>
</div>
<div id="share-embed-tmpl">
    <div id="shareEmbedModal" class="modal hide fade" tabindex="-1" role="dialog" aria-labelledby="shareEmbedModalLabel" aria-hidden="true">
      <div class="modal-header">
        <button type="button" class="close" data-dismiss="modal" aria-hidden="true">Ã</button>
        <h3 id="shareEmbedModalLabel"></h3>
      </div>
      <div class="modal-body">

     
<textarea rows="10" class="embed-textarea">
     

</textarea>


      </div>
   </div>
</div>

<div  class="content post js-post">
    <div class="sl-layout-post">
        
<div  class="content post post-video post-jw-video">
    <div class="sl-layout-post row-fluid">

        <div class="span8">
            <!-- Sponsored Post Tag -->
                
            <h1>Most hurricanes that hit the US come from the same exact spot in the world</h1>
            <div id="content" class="content">
                <!-- Byline -->
                <div class="flex byline">
	    
	
	<div class="flex-item">
		<div class="list-pipes no-pipe">
			<ul>
																		<li class="author-byline ks-author-byline"><a href="http://www.businessinsider.com/author/rob-ludacer">Rob Ludacer</a> <span class="text-and">and</span> <a href="http://www.businessinsider.com/author/jessica-orwig">Jessica Orwig</a></li>
											                
				                    </ul>
                </div>
                <div class="list-pipes no-pipe">
                    <ul>
                		        			        <li class="river-post__date">
	<span class="svg sprites date-icon"></span>
	<span data-bi-format="date" rel="1504895138">Sep.  8, 2017,  2:25 PM</span>
</li>		        			
		    				<li class="pageviews">
					<span class="svg sprites very-hot views"></span>
					<span class="very-hot" title="Engagement">39,052</span>
				</li>
		    
		    
			</ul>

		</div>
	</div>
</div>                                <div id="video-anchor"
                    data-video-post
                    data-media-id="D6TmWK3e"
                    data-auto-start="true"
                    data-ad-tag-url="http://pubads.g.doubleclick.net/gampad/ads?sz=640x480&gdfp_req=1&env=vp&output=vast&unviewed_position_start=1&impl=s&url=http%3A%2F%2Fwww.businessinsider.com%2Fwhat-causes-hurricanes-irma-harvey-jose-sahara-africa-easterly-atlantic-2017-9&correlator=TIME_STAMP&cust_params=vp_abl%3D1%26tag%3DVideo%2CBI-Original-Video%2CTI-Original-Video%2CHurrican-Irma%2CHurricane%2CHurricane-Harvey%2CHurricane-Harvey-2017%2CHurricane-Jose%2CHurricane-Jose-2017%2CWeather%2CWind%2CAfrica%2CSahara%2CSahara-Desert%2CMeteorology%2CAtlantic%2CAtlantic-Ocean%2CFlorida%2CGulf-Coast%2CGulf-of-Mexico%2CBI-Animation%26authors%3DRob-Ludacer%2CJessica-Orwig%26mpt%3DJWPlayer&cmsid=642&vpos=preroll&vid=D6TmWK3e&pagetype=video&description_url=http%3A%2F%2Fwww.businessinsider.com%2Fwhat-causes-hurricanes-irma-harvey-jose-sahara-africa-easterly-atlantic-2017-9&iu=4442842%2FDesktop%2Fscience"
                    data-show-ad="true"
                    data-ad-placement="pre"
                    data-show-recommendations="true"
                    data-recommendations-id=4yvN3aI1                >
                </div>

                <!-- Sharing -->
                <div class="bottom-share-module">
                    
<!-- RRSSB start -->
<div class="rrssb-baseline share-container ks-share-top clearfix" data-share style="display:block;">
    <!-- buttons start here -->
    <ul class="rrssb-buttons rrssb-top clearfix">
                <li class="facebook ks-byline-fb">
            <a href="https://www.facebook.com/sharer/sharer.php?u=http://www.businessinsider.com/what-causes-hurricanes-irma-harvey-jose-sahara-africa-easterly-atlantic-2017-9" title="facebook" class="popup">
                <i class="fa fa-facebook-square"></i>
                <span class="text">facebook</span>
            </a>
        </li>
        
                <li class="linkedin ks-byline-linkedin">
            <a href="http://www.linkedin.com/shareArticle?mini=true&amp;url=http://www.businessinsider.com/what-causes-hurricanes-irma-harvey-jose-sahara-africa-easterly-atlantic-2017-9&amp;title=Most hurricanes that hit the US come from the same exact spot in the world&amp;summary=Irma and Harvey were born half a world away." title="linkedin" class="popup">
                <i class="fa fa-linkedin"></i>
                <span class="text">linkedin</span>
            </a>
        </li>
        
                <li class="twitter ks-byline-tweet">
            <a href="http://twitter.com/share?url=http://read.bi/2weE9cn&amp;via=SciInsider&amp;text=Most+hurricanes+that+hit+the+US+come+from+the+same+exact+spot+in+the+world" title="twitter" class="popup">
                <i class="fa fa-twitter"></i>
                <span class="text">twitter</span>
            </a>
        </li>
        
        
                <li class="email button-email ks-byline-email" data-href="http://www.businessinsider.com/what-causes-hurricanes-irma-harvey-jose-sahara-africa-easterly-atlantic-2017-9">
            <a href="#" title="email">
                <i class="icon-email light"></i>
                <span class="text">email</span>
            </a>
        </li>
        

                            
        
                    <li class="printbtn button-embed ks-byline-embed">
                <a href="#" title="embed">
                    <i class="fa fa-code"></i>
                    <span class="text">embed</span>
                </a>
            </li>
            </ul>
    <!-- buttons end here -->
</div>
<!-- RRSSB end -->                </div>

                <div class="KonaBody post-content">
                    
<p>As Hurricane Irma bears down on the East coast, FloridiansÂ may be wondering where all the hurricanes come from, and why they all follow a similar course. In fact, Irma, Harvey, and Jose were all born on the other side of the Atlantic, off the coast of Africa, and the Sahara desert may be to blame.</p>
<p><span><strong>Follow Tech Insider:</strong>Â <a href="https://www.facebook.com/techinsider">On Facebook</a></span></p>
                </div>

                <div class="see-also-video">
                                    </div>

                                                
                <!-- Piano Lower Left Promo  -->
                <div class="piano-sticky-wrapper">
    <div class="piano-sticky-inline"></div>
</div>
            </div>
        </div>

                    <div class="span4 video-page-rail">

                <!-- Upper 300 -->
                
                <!-- Taboola right rail thumbnails (internal recirc, always show)-->
                <div id="taboola-right-rail-thumbnails"></div>
                <script type="text/javascript">
                    window._taboola = window._taboola || [];
                    _taboola.push({mode: 'organic-thumbnails-b',container: 'taboola-right-rail-thumbnails',placement: 'Right Rail Thumbnails', target_type: 'video'});
                </script>
            </div>
            </div>

    

                                        <h3 class="underlined thin print-hide">Most Popular</h3>
                        <div class="row-fluid recirc margin-bottom ks-video-popular">
                                                    <div class="span2">
                        <a href="http://www.businessinsider.com/how-to-lose-weight-brain-body-effects-2017-10">
                            <div class="seealso-image">
                                <div class="corner video">
                                    <i class="sprites"></i>
                                </div>
                                                                    <img src="http://static2.businessinsider.com/image/59f22836bcf93d46008b4b94-215/heres-what-losing-weight-does-to-your-body-and-brain.jpg" alt="" />
                                                            </div>
                        </a>
                        <h4>
                            <a class="title-link" href="http://www.businessinsider.com/how-to-lose-weight-brain-body-effects-2017-10">Here's what losing weight does to your body and brain</a>
                        </h4>
                    </div>
                                                                    <div class="span2">
                        <a href="http://www.businessinsider.com/exercise-workout-shape-routine-2016-12">
                            <div class="seealso-image">
                                <div class="corner video">
                                    <i class="sprites"></i>
                                </div>
                                                                    <img src="http://static5.businessinsider.com/image/575eaa4add0895d8018b496d-215/an-exercise-scientist-reveals-exactly-how-long-you-need-to-work-out-to-get-in-great-shape.jpg" alt="" />
                                                            </div>
                        </a>
                        <h4>
                            <a class="title-link" href="http://www.businessinsider.com/exercise-workout-shape-routine-2016-12">An exercise scientist reveals exactly how long you need to work out to get in great shape</a>
                        </h4>
                    </div>
                                                                    <div class="span2">
                        <a href="http://www.businessinsider.com/why-boeing-747-front-hump-2016-11">
                            <div class="seealso-image">
                                <div class="corner video">
                                    <i class="sprites"></i>
                                </div>
                                                                    <img src="http://static6.businessinsider.com/image/583ef046e02ba71e008b6cc8-215/heres-why-boeing-747s-have-a-giant-hump-in-the-front.jpg" alt="" />
                                                            </div>
                        </a>
                        <h4>
                            <a class="title-link" href="http://www.businessinsider.com/why-boeing-747-front-hump-2016-11">Here's why Boeing 747s have a giant hump in the front</a>
                        </h4>
                    </div>
                                                                    <div class="span2">
                        <a href="http://www.businessinsider.com/why-you-should-never-throw-away-silica-bags-again-2016-2">
                            <div class="seealso-image">
                                <div class="corner video">
                                    <i class="sprites"></i>
                                </div>
                                                                    <img src="http://static4.businessinsider.com/image/56ccddef8b987dbf21ad3d8f-215/why-you-should-never-throw-away-these-bags-again.jpg" alt="" />
                                                            </div>
                        </a>
                        <h4>
                            <a class="title-link" href="http://www.businessinsider.com/why-you-should-never-throw-away-silica-bags-again-2016-2">Why you should never throw away these bags again</a>
                        </h4>
                    </div>
                                                                    <div class="span2">
                        <a href="http://www.businessinsider.com/running-lose-weight-shawn-arent-exercise-health-science-2016-12">
                            <div class="seealso-image">
                                <div class="corner video">
                                    <i class="sprites"></i>
                                </div>
                                                                    <img src="http://static3.businessinsider.com/image/583ee814ba6eb602688b5b87-215/an-exercise-scientist-reveals-the-exercise-regime-that-will-burn-the-most-fat.jpg" alt="" />
                                                            </div>
                        </a>
                        <h4>
                            <a class="title-link" href="http://www.businessinsider.com/running-lose-weight-shawn-arent-exercise-health-science-2016-12">An exercise scientist reveals the exercise regime that will burn the most fat</a>
                        </h4>
                    </div>
                                            </div>
            
                        <h3 class="underlined thin print-hide">Most Recent</h3>
                <div class="row-fluid recirc margin-bottom ks-video-recent">
                            <div class="span2">
                    <a href="http://www.businessinsider.com/do-compression-pants-gear-really-work-exercise-workout-running-2018-2">
                        <div class="seealso-image">
                            <div class="corner video">
                                <i class="sprites"></i>
                            </div>
                                                            <img src="http://static2.businessinsider.com/image/5a7a26d2e559f02c008b4981-215/how-compression-pants-work-and-why-they-are-so-popular.jpg" alt="" />
                                                    </div>
                    </a>
                    <h4>
                        <a class="title-link" href="http://www.businessinsider.com/do-compression-pants-gear-really-work-exercise-workout-running-2018-2">How compression pants work and why they are so popular</a>
                    </h4>
                </div>
                            <div class="span2">
                    <a href="http://www.businessinsider.com/hr-block-turbotax-which-tax-filing-service-is-better-2018-2">
                        <div class="seealso-image">
                            <div class="corner video">
                                <i class="sprites"></i>
                            </div>
                                                            <img src="http://static1.businessinsider.com/image/5a7e2754d0307218008b5019-215/we-compared-hr-block-and-turbotax-to-find-out-which-service-was-better-for-filing-taxes.jpg" alt="" />
                                                    </div>
                    </a>
                    <h4>
                        <a class="title-link" href="http://www.businessinsider.com/hr-block-turbotax-which-tax-filing-service-is-better-2018-2">We compared H&R Block and TurboTax to find out which service was better for filing taxes</a>
                    </h4>
                </div>
                            <div class="span2">
                    <a href="http://www.businessinsider.com/why-is-caviar-so-expensive-2018-2">
                        <div class="seealso-image">
                            <div class="corner video">
                                <i class="sprites"></i>
                            </div>
                                                            <img src="http://static3.businessinsider.com/image/5a7dbcb9d030721f008b4bd6-215/why-caviar-is-so-expensive.jpg" alt="" />
                                                    </div>
                    </a>
                    <h4>
                        <a class="title-link" href="http://www.businessinsider.com/why-is-caviar-so-expensive-2018-2">Why caviar is so expensive</a>
                    </h4>
                </div>
                            <div class="span2">
                    <a href="http://www.businessinsider.com/amazon-go-new-store-retail-innovation-technology-2018-2">
                        <div class="seealso-image">
                            <div class="corner video">
                                <i class="sprites"></i>
                            </div>
                                                            <img src="http://static2.businessinsider.com/image/5a7b0b9ecdab5f92008b4ae3-215/what-its-really-like-inside-amazons-new-no-line-grocery-store.jpg" alt="" />
                                                    </div>
                    </a>
                    <h4>
                        <a class="title-link" href="http://www.businessinsider.com/amazon-go-new-store-retail-innovation-technology-2018-2">What it's really like inside Amazon's new no-line grocery store.</a>
                    </h4>
                </div>
                            <div class="span2">
                    <a href="http://www.businessinsider.com/about-kim-yo-jong-sister-north-korea-dictator-kim-jong-un-winter-olympics-south-korea-2018-2">
                        <div class="seealso-image">
                            <div class="corner video">
                                <i class="sprites"></i>
                            </div>
                                                            <img src="http://static4.businessinsider.com/image/5a7b8b04cdab5f24008b4f25-215/north-korea-is-sending-kim-jong-uns-sister-to-the-winter-olympics--heres-everything-we-know-about-her.jpg" alt="" />
                                                    </div>
                    </a>
                    <h4>
                        <a class="title-link" href="http://www.businessinsider.com/about-kim-yo-jong-sister-north-korea-dictator-kim-jong-un-winter-olympics-south-korea-2018-2">North Korea is sending Kim Jong Un's sister to the Winter Olympics â here's everything we know about her</a>
                    </h4>
                </div>
                    </div>
    </div>


        <div id="social-reader-notification" class="alert clear-both" style="display:none;"></div>

        <div id="facebook-notification" class="alert" style="display:none;"></div>

            </div>

        
    <!-- Simple Reach (all post types) -->
    
</div>

                    </div>
                    
                </div>
            </div>

            
            </div>

            <div class="footer redesign" data-bi-footer>

                <div class="container redesign">

                                            <!-- Desktop Redesign Footer -->
                        <div class="row redesign-footer-site-row">
                            <span class="span12 redesign-footer-site-span">
                                <a href="/" class="redesign-footer-site-logo"></a>

                                <ul class="redesign-social-icon-list">
                                                                            

    <li class="redesign-social-icon-list-item">
        <a class="redesign-social-icon-link" href="//www.facebook.com/businessinsider" title="Like us on Facebook" aria-label="Like us on Facebook" target="_blank">
            <i class="fa fa-facebook ks-header-facebook redesign-social-icon"></i>
        </a>
    </li>

    <li class="redesign-social-icon-list-item">
        <a class="redesign-social-icon-link" href="//twitter.com/businessinsider" title="Follow us on Twitter" aria-label="Follow us on Twitter" target="_blank">
            <i class="fa fa-twitter ks-header-twitter redesign-social-icon"></i>
        </a>
    </li>

    <li class="redesign-social-icon-list-item">
        <a class="redesign-social-icon-link" href="//www.linkedin.com/company/businessinsider" title="Connect with us on LinkedIn" aria-label="Connect with us on LinkedIn" target="_blank">
            <i class="fa fa-linkedin ks-header-linkedin redesign-social-icon"></i>
        </a>
    </li>
                                    
                                    <li class="redesign-social-icon-list-item">
                                        <a class="redesign-social-icon-link" href="//www.youtube.com/user/businessinsider" title="Subscribe to our YouTube channel" aria-label="Subscribe to our YouTube channel" target="_blank">
                                            <i class="fa fa-youtube-play redesign-social-icon"></i>
                                        </a>
                                    </li>

                                    <li class="redesign-social-icon-list-item">
                                        <a class="redesign-social-icon-link" href="//www.instagram.com/businessinsider/" title="Follow us on Instagram" aria-label="Follow us on Instagram" target="_blank">
                                            <i class="fa fa-instagram redesign-social-icon instagram"></i>
                                        </a>
                                    </li>

                                </ul>

                                <span class="redesign-footer-app-stores">
                                    <a href="https://itunes.apple.com/app/apple-store/id554260576?mt=8" target="_blank" class="redesign-footer-badge app-store"></a>
                                    <a href="https://play.google.com/store/apps/details?id=com.freerange360.mpp.businessinsider" target="_blank" class="redesign-footer-badge google-play"></a>
                                </span>
                            </span>
                        </div>
                        <div class="row redesign-footer-sister-row">
                            <span class="span12 redesign-footer-sister-span">
                                <a href="//www.thisisinsider.com" class="redesign-footer-sister-sites sister-one" title="Insider" aria-label="Insider"></a>
                                <a href="//markets.businessinsider.com" class="redesign-footer-sister-sites sister-two" title="Markets Insider" aria-label="Markets Insider"></a>
                                <a href="//intelligence.businessinsider.com/?utm_source=businessinsider&utm_medium=site_footer&utm_term=bi_site_footer&utm_content=bi_site_footer&utm_campaign=bi_site_footer" class="redesign-footer-sister-sites sister-three" title="//intelligence.businessinsider.com/?utm_source=businessinsider&utm_medium=site_footer&utm_term=bi_site_footer&utm_content=bi_site_footer&utm_campaign=bi_site_footer" aria-label="//intelligence.businessinsider.com/?utm_source=businessinsider&utm_medium=site_footer&utm_term=bi_site_footer&utm_content=bi_site_footer&utm_campaign=bi_site_footer"></a>
                            </span>
                        </div>
                        <div class="row redesign-footer-copyright-row">
                            <span class="span12 redesign-footer-copyright-span">
                                * Copyright &copy; 2018 Business Insider Inc. All rights reserved. <span class="nowrap">Registration on or use of this site constitutes acceptance of our
                                                                        <a href="/terms">Terms of Service</a>                                    and
                                                                                                            <a href="/privacy-policy">Privacy Policy</a>.</span>
                                <div class="redesign-footer-links">
                                    <ul>
                                                                                    <li><a href="/sitemap/index.html">Sitemap</a></li>
                                                                                <li><a href="/disclaimer">Disclaimer</a></li>
                                                                                    <li><a href="/commerce-on-business-insider">Commerce Policy</a></li>
                                                                                                                            <li><a href="http://nytm.org/made">Made in NYC</a></li>
                                                                                                                                                                    <li>Stock quotes by <a href="http://www.finanzen.net/">finanzen.net</a></li>
                                                                            </ul>
                                </div>
                                <div class="international-links redesign-footer-list">
                                    <ul>
                                        <li>International Editions:</li>
                                        <li><a href="http://uk.businessinsider.com?IR=C">UK</a></li><li><a href="http://www.businessinsider.de?IR=C">DE</a></li><li><a href="http://www.businessinsider.com.au/">AUS</a></li><li><a href="https://www.businessinsider.es">ES</a></li><li><a href="http://www.businessinsider.fr/?IR=C">FR</a></li><li><a href="http://www.businessinsider.in/">IN</a></li><li><a href="https://it.businessinsider.com">IT</a></li><li><a href="http://www.businessinsider.jp">JP</a></li><li><a href="http://www.businessinsider.my/">MY</a></li><li><a href="http://www.businessinsider.nl?IR=C">NL</a></li><li><a href="http://www.businessinsider.com.pl/?IR=C">PL</a></li><li><a href="http://nordic.businessinsider.com/?IR=C">SE</a></li><li><a href="http://www.businessinsider.sg/">SG</a></li><li><a href="https://www.businessinsider.co.za">ZA</a></li>                                    </ul>
                                </div>
                                                            </span>
                        </div>

                                            </div>
                    </div>
                </div>
            </div>
        </div>

    </div>
</div>




<script type="text/javascript" src="http://static6.businessinsider.com/assets/js/min-foot.js?1518460446"></script>

<!--[if gte IE 9]>
<script type="text/javascript">amplify.publish("ie9-pinned-site", {"hid":null,"vertical":"science"});</script><![endif]-->

<!-- Freemium User Check -->
 <script type="text/javascript">
    document.addEventListener("DOMContentLoaded", function() { 
        if (BI.cookies.get("bipf")) {
            document.body.classList.add("bipf");
        }
    }); 
</script>
<!-- End Freemium User Check -->

<!-- Google Tag Manager -->
<noscript><iframe src=""//www.googletagmanager.com/ns.html?id=GTM-NS64GV"" height=""0"" width=""0"" style=""display:none;visibility:hidden""></iframe></noscript>
<script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
'//www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-NS64GV');</script>
<!-- End Google Tag Manager -->

<!-- Piano -->
<!-- End Piano -->

<!-- Twitter widget.js -->
<script type="text/javascript">
    !function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0];if(!d.getElementById(id)){
        js=d.createElement(s);
        js.id=id;
        js.src="https://platform.twitter.com/widgets.js";
        js.async=true;
        fjs.parentNode.insertBefore(js,fjs);
    }}(document,"script","twitter-wjs");
</script>
<!-- /Twitter widget.js -->

    
    <!-- Begin comScore Tag -->
    <script type="text/javascript">
        var _comscore = _comscore || [];
        _comscore.push({ c1: "2", c2: "9900186"
            , options:{ url_append:"comscorekw = science"}        });
        (function() {
            var s = document.createElement("script"), el = document.getElementsByTagName("script")[0];
            s.async = true;
            s.src = (document.location.protocol == "https:" ? "https://sb" : "http://b") + ".scorecardresearch.com/beacon.js";
            el.parentNode.insertBefore(s, el);
        })();
    </script>
    <noscript>
        <img src="http://b.scorecardresearch.com/p?c1=2&c2=9900186&cv=2.0&cj=1" />
    </noscript>
    <!-- End comScore Tag -->

        <!-- Chartbeat -->
    <script type="text/javascript">
        // chartbeat wants the vars in global
        window._sf_async_config.sections = 'science';
        window._sf_async_config.authors = 'Rob Ludacer and Jessica Orwig';

        //only set the following if on a video post
                    window._sf_async_config.videoType = 'ooyala';
        
        //only set the following if on a sponsored post
        
        (function(){
          function loadChartbeat() {
            window._sf_endpt=(new Date()).getTime();
            var e = document.createElement('script');
            e.setAttribute('language', 'javascript');
            e.setAttribute('type', 'text/javascript');
            e.setAttribute('src',
               (('https:' === document.location.protocol) ? 'https://s3.amazonaws.com/' : 'http://') +
               'static.chartbeat.com/js/chartbeat_video.js');
            document.body.appendChild(e);
          }
          var oldonload = window.onload;
          window.onload = (typeof window.onload != 'function') ?
             loadChartbeat : function() { oldonload(); loadChartbeat(); };
        })();
    </script>
    <!-- / Chartbeat -->
    
            <!-- Sailthru Concierge -->
        <script type="text/javascript" src="http://ak.sail-horizon.com/horizon/v1.js"></script>
        <script type="text/javascript" src="http://ak.sail-horizon.com/scout/v1.js"></script>
        <script type="text/javascript">
        $(function() {
            // Sailthru Concierge
            if (window.Sailthru) {
                var sailthruOpts = {
                    domain: 'horizon.businessinsider.com'
                                    };
                if (window.outerWidth < 800) { //on small screens we dont want the flyout to appear
                    delete sailthruOpts.concierge;
                }
                Sailthru.setup(sailthruOpts);
            }
        });
        </script>
        <!-- / Sailthru Concierge -->
            
<!-- Perfect market JS -->
    <!-- End Perfect market JS-->

<!-- taboola foot -->
    <script type="text/javascript">
        window._taboola = window._taboola || [];
        _taboola.push({flush: true});
    </script>



<script type="text/javascript">window.NREUM||(NREUM={});NREUM.info={"beacon":"bam.nr-data.net","licenseKey":"4b4136998e","applicationID":"13516968","transactionName":"ZVZVZRBVXEJVVkJRDVwcdEQRQF1cG0VZSxY=","queueTime":0,"applicationTime":288,"atts":"SRFCE1hPTx0WVBQCGU9O","errorBeacon":"bam.nr-data.net","agent":""}</script></body>
</html>
