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ScientificAmerican;performance.mark('app-load-start');((d,ael,dcl,unl,cxl,log,onunl)=>{log('[readyState]',d.readyState);d[ael]('readystatechange',()=>log('[readyState]',d.readyState));d[ael](dcl,()=>log(dcl));d[ael](unl,onunl);window.onload=()=>{d.removeEventListener(unl,onunl);log('windowloaded')};})(document,'addEventListener','DOMContentLoaded','beforeunload','cancelled',(...msg)=>console.log('[dev]',...msg),()=>{winScientific American: Scientific News, expert Analysis, Health Research - SScientific American: Scientific News, expert Analysis, Health Research - Scientific Americancientific Americandow[cxl]=true;log(cxl)});((l,pii)=>{if(pii.some(p=>l.search.includes(p+"="))){winScientific American: Scientific News, expert Analysis, Health Research - Scientific Americandow.initSearch=l.search;constanon=newURLSearchParams(l.search);pii.forEach(p=>anon.delete(p));history.replaceState({},"",l.pathname+"?"+anon);}})(location,["email","mic_link","token","code","state"]);SkiptomaincontentScientificAmericanScientificAmericanEvolutionaryBiologyDecember17,2024GreatApesJokeAround,SuggestingHumorIsOlderThanHumansStudiesofgreatapeshintatwhyandwhenclowningbehiorevolvedEricaCartmillPaleontologyDecember19,2024MostExpensiveDinosaurFossilEverCouldRevealStegosaurusSecretsZaneWolfConservationDecember20,2024ConservationEffortsAreBringingPandas,WolvesandPanthersBackfromtheBrinkAshleighPapp,RachelFeltman,JefferyDelViscio,MadisonGoldbergAstronomyDecember19,2024Behold!2024’sMostStunningSpacePhotosMeghanBartelsGamesDecember21,2024KillerSudoku:December21,2024SciAmGames$0forDigitalAccessReadallthestoriesyouwant.OpinionDecember21,2024HowFeminismCanGuideClimateChangeActionLauraTurquet,SilkeStaab,BriannaHowellEvolutionDecember20,2024Run,Lucy,Run!HumanAncestorsCouldJogbutNotVeryFarorFastGemmaConroy,NaturemazineSolarsystemDecember20,2024AncientMoonMeltEventMayExplain150-Million-YearGapineEstimatesPayalDharPublicHealthDecember20,2024HowtheU.S.LostControlofBirdFlu,SettingtheSteforAnotherPandemicAmyMaxmen,KFFHealthNewsExploreTopicsHealthMind&BrainEnvironmentTechnologySpace&PhysicsBiologyMathChemistrySocialSciencesVideosPodcastsOpinionGamesReportsViewAllStoriesJanuary2025IssuePlanetaryScienceWeMayBeontheBrinkofFindingtheRealPlanetNineRobinGeorgeAndrewsEvolutionaryBiologyGreatApesJokeAround,SuggestingHumorIsOlderThanHumansEricaCartmillEcologyHowtoStoptheNextViralPandemicJaneQiuSleepTheNewScienceofControllingLucidDreamsMichelleCarrNeuroscienceTheVusNerve’sMysteriousRoleinMentalHealthUntangledJenaPincottExtraterrestrialLifeNASA’sEuropaClipperSpacecraftAimsforJupiter’sMostIntriguingMoonNadiaDrakeViewFullIssueExploreArchiveGamesSpellementsCreateasmanywordsasyoucanMathPuzzlesStretchyourmathmuscleswiththesepuzzlesAllGamesScienceinspiredgames,puzzlesandquizzesSpecialEditionEvolutionToFollowtheRealEarlyHumanDiet,EatEverythingKateWongPhysiologyNewHumanMetabolismResearchUpendsConventionalWisdomaboutHowWeBurnCaloriesHermanPontzerFitnessWhyYourBrainNeedsExerciseDidA.Raichlen,GeneE.AlexanderObesityPeopleWhoAreFatandHealthyMayHoldKeystoUnderstandingObesityChristieAschwandenPublicHealthHowMuchVitaminDDoYouNeedtoStayHealthy?ChristieAschwandenPharmaceuticalsTheseCancersWereBeyondTreatment—ButMightNotBeAnymoreJyotiMadhusoodananViewFullIssueExploreArchiveGetOurDailyNewsletterIreemyinformationwillbeprocessedinaccordancewiththeScientificAmericanandSpringerNatureLimitedPrivacyPolicy.SignUpThankyouforsigningup! CheckoutourothernewslettersPodcastsDecember20,2024ConservationEffortsAreBringingPandas,WolvesandPanthersBackfromtheBrinkAshleighPapp,RachelFeltman,JefferyDelViscio,MadisonGoldbergConservationDecember18,2024Today’sConservationistsAreInspiredbyHomelandandHeriteAshleighPapp,RachelFeltman,JefferyDelViscio,MadisonGoldbergConservationDecember16,2024AudioandImery,InterpretedbyAI,AreImprovingConservationStudiesAshleighPapp,RachelFeltman,JefferyDelViscio,MadisonGoldbergConservationDecember13,2024WhyAreZoosControversial?AshleighPapp,RachelFeltman,JefferyDelViscio,MadisonGoldbergArtificialIntelligenceDecember11,2024WillAIAudioReplacePodcasts?NotSoFastRachelFeltman,AllisonParshall,FondaMwangiMorePodcastsPopularStoriesPlanetaryScienceDecember17,2024WeMayBeontheBrinkofFindingtheRealPlanetNineIfthere’sahiddenworldinthesolarsystem,anewtelescopeshouldfinditRobinGeorgeAndrewsNeuroscienceDecember17,2024TheVusNerve’sMysteriousRoleinMentalHealthUntangledThehealingpotentialofthebrain’smostinterconnectednerveintriguesresearchersJenaPincottMathematicsDecember19,2024MysteriousConstantthatMakesMathematiciansDespairTheproofthattheApéryconstantisirrationalremainsoneofthemostbizarreeventsinthehistoryofmathematicsManonBischoffOpinionDecember18,202478BooksScientificAmericanRecommendsin2024AcollectionofnonfictionandfictionbooksScientificAmericaneditorialstaffandcontributorsreadandrecommendin2024BrianneKaneExtraterrestrialLifeDecember19,2024ScientistsDiscoverEarthLifeinsideanAsteroidSampleMaterialfromasteroidRyuguriddledwithearthlymicrobesprovidesacautionarytaleforscientistsseekingsignsofalienlifeSharmilaKuthunurNeuroscienceDecember17,2024TheUnbelievableSlownessofThinkingThebrainissometimescalledthemostcomplexmachineintheknownuniverse.Butthethoughtsthatitoutputsputteralongatatrifling10bitspersecond,thepaceofaconversationRachelNuwerViewAllStoriesExpandYourWorldwithScienceLearnandsharethemostexcitingdiscoveries,innovationsandideasshapingourworldtoday.SubscribeSignupforournewslettersSeethelateststoriesReadthelatestissueGiveaGiftSubscriptionFollowUs:Return&RefundPolicyAboutPressRoomFAQsContactUsInternationalEditionsAdvertiseAccessibilityStatementTermsofUsePrivacyPolicyCaliforniaConsumerPrivacyStatementUseofcookies/DonotsellmydataScientificAmericanispartofSpringerNature,whichownsorhascommercialrelationswiththousandsofscientificpublications(manyofthemcan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