Whenitcomestogettingolder,humansaren'tsospecialafterall.Itturnsouttheirpatternofagingisn'ttoodifferentfrommostotherprimates,suchaschimps,monkeysandbaboons,newresearchshows.
AteamledbyAnneBronikowskiofstudieddataonprimateagingcollectedoverdecadesaroundtheworldandcompareditwithstatisticsonmodernAmericans.Agingwasdefinedastheincreasedriskofdyingfromnaturalcauseswhilegettingolder.Someexpertshavethoughtthatbecausepeoplehaverelativelylonglifespans,humansageddifferentlyfromothermammals.
Theresearchteambelievedthatanymajordifferencebetweenhumansandprimateswasmostlikelytoshowupwithmodernpeople,ratherthanahunter-gathererculture,Bronikowskisaidinatelephoneinterview."Andthefactthatwedon'tfindadifferencethereismorecompelling."
Thebasicpatterntheyfoundisarelativelyhighriskofdyingininfancy(幼儿时期),alowriskofdeathduringthejuvenileyearsandthenanincreasedriskofdyingasagingprogressed.Also,theyfoundthatinmostcasesmalesdon'tliveaslongasfemales.TheauthorswroteitinastudypublishedonlineThursdayintheJournalScience.
TheonlyexceptiontothegeneralpatternwasthemuriquimonkeyinBrazil;malesandfemaleshavesimilarlifespans.Unlikeotherprimates,muriquimalesdonotcompetewitheachotherforaccesstofemales.Instead,theycooperatewitheachother,explainedco-authorKarenStrier,ananthropologistattheUniversityofWisconsinwhohasstudiedmuriquissince1982.Theresearcherssaidthereasonmalesofotherspeciesdieearlierthanfemalesmaybearesultofstressofcompetition.
JosephW.KemnitsoftheWisconsinNationalPrimateResearchCetercalledthestudy"animportantstep"becauseitprovidesthefirstassessmentofpatternsofaginginlargepopulationsofnonhumanprimateslivingintheirnaturalenvironments.Kemnitswasnotpartoftheresearchteam.
"Thestudyofotherprimatescontributestounderstandinghumanagingbecausewesharesomuchofourbasicphysiology,"addedanthropologyprofessorKristenHawkesofthe,whowasnotpartoftheresearchteam.
67.Whatisthemainideaofthepassage?___
A.Humansandap