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1、TED英语演讲稿：我们为什么快乐？ whenyouhave21minutestospeak,twomillionyearsseemslikeareallylongtime.butevolutionarily,twomillionyearsisnothing.andyetintwomillionyearsthehumanbrainhasnearlytripledinmass,goingfromtheone-and-a-quarterpoundbrainofourancestorhere,habilis,tothealmo
2、stthree-poundmeatloafthateverybodyherehasbetweentheirears.whatisitaboutabigbrainthatnaturewassoeagerforeveryoneofustohaveone? well,itturnsoutwhenbrainstripleinsize,theydon'tjustgetthreetimesbigger;theygainnewstructures.andoneofthemainreasonsourbraingotsobigisbec
3、auseitgotanewpart,calledthe"frontallobe."andparticularly,apartcalledthe"pre-frontalcortex."nowwhatdoesapre-frontalcortexdoforyouthatshouldjustifytheentirearchitecturaloverhaulofthehumanskullintheblinkofevolutionarytime? well,itturnsoutthepre-frontalcortexdoeslot
4、softhings,butoneofthemostimportantthingsitdoesisitisanexperiencesimulator.flightpilotspracticeinflightsimulatorssothattheydon'tmakerealmistakesinplanes.humanbeingshavethismarvelousadaptationthattheycanactuallyhaveexperiencesintheirheadsbeforetheytrythemoutinreall
5、ife.thisisatrickthatnoneofourancestorscoulddo,andthatnootheranimalcandoquitelikewecan.it'samarvelousadaptation.it'suptherewithopposablethumbsandstandinguprightandlanguageasoneofthethingsthatgotourspeciesoutofthetreesandintotheshoppingmall. now--(laughter)--allof
6、youhavedonethis.imean,youknow,benandjerry'sdoesn'thaveliver-and-onionicecream,andit'snotbecausetheywhippedsomeup,trieditandwent,"yuck."it'sbecause,withoutleavingyourarmchair,youcansimulatethatflavorandsay"yuck"beforeyoumakeit. let'sseehowyourexperiencesimulators
7、areworking.let'sjustrunaquickdiagnosticbeforeiproceedwiththerestofthetalk.here'stwodifferentfuturesthatiinviteyoutocontemplate,andyoucantrytosimulatethemandtellmewhichoneyouthinkyoumightprefer.oneofthemiswinningthelottery.thisisabout314milliondollars.andtheotheri
8、sbecomingparaplegic.so,justgiveitamomentofthought.youprobablydon'tfeellikeyouneedamomentofthought. interestingly,therearedataonthesetwogroupsofpeople,dataonho
