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