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锟斤拷图为锟斤拷锟斤拷锟较凤拷锟斤拷猿锟斤拷头锟角骨碉拷应压锟斤拷图锟斤拷锟斤拷锟斤拷锟较凤拷锟斤拷猿锟斤拷一锟斤拷锟窖撅拷锟斤拷锟斤拷说锟斤拷锟斤拷锟斤拷锟斤拷啵拷锟斤拷锟斤拷锟角帮拷食锟剿阂э拷锟斤拷锟斤拷锟酵硷拷锟斤拷锟斤拷薜锟斤拷锟缴拷锟斤拷压锟斤拷锟叫关★拷
锟斤拷锟借经锟斤拷锟斤拷锟斤拷锟斤拷锟剿碉拷锟斤拷锟揭拷锟斤拷锟斤拷菘锟斤拷锟斤拷锟接诧拷亩锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷嵌缘摹锟斤拷锟斤拷锟斤拷头锟角癸拷锟斤拷为小小锟斤拷锟斤拷缀痛锟斤拷锟斤拷锟斤拷锟斤拷荩锟斤拷锟斤拷也锟斤拷锟斤拷锟斤拷锟斤拷锟剿阂э拷锟接诧拷锟斤拷锟斤拷濉ｏ拷锟斤拷牵锟斤拷锟窖э拷锟剿碉拷锟斤拷锟斤拷堑锟斤拷锟斤拷锟斤拷锟斤拷锟饺达拷锟斤拷锟斤拷锟剿★拷
锟斤拷锟斤拷锟斤拷锟斤拷锟揭匡拷学院院锟斤拷锟斤拷(PNAS)锟斤拷2009锟斤拷2锟铰凤拷锟斤拷锟斤拷一锟斤拷锟铰碉拷锟叫撅拷锟斤拷示锟斤拷锟斤拷锟斤拷25锟斤拷锟斤拷前锟斤拷锟斤拷锟斤拷拥锟斤拷锟斤拷锟斤拷锟捷匡拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷锟斤拷锟斤拷使锟斤拷锟斤拷锟节伙拷锟斤拷锟侥憋拷时锟斤拷寻锟斤拷锟铰碉拷锟斤拷锟斤，锟侥憋拷锟斤拷食习锟竭ｏ拷锟接讹拷锟斤拷应锟铰伙拷锟斤拷锟斤拷
锟斤拷锟斤拷锟斤拷锟斤拷桑锟斤拷锟斤拷锟斤拷锟斤拷学锟斤拷锟斤拷锟斤拷锟节ｏ拷Mark Spencer锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟结发展学锟斤拷锟斤拷锟较伙拷牟锟绞匡拷芯锟斤拷锟紺aitlin Schrein锟斤拷锟斤拷一锟斤拷锟斤拷锟叫撅拷小锟斤拷某锟皆憋拷锟斤拷芯锟斤拷锟皆憋拷锟斤拷锟斤拷锟斤拷锟斤拷一锟叫撅拷锟斤拷锟斤拷撰写锟斤拷锟斤拷锟铰★拷锟斤拷锟斤拷锟较凤拷锟斤拷猿锟侥革拷食锟斤拷锟斤拷锟斤拷学锟斤拷锟斤拷食锟斤拷态学锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷学锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟侥ｏ拷秃锟侥ｏ拷夤ひ碉拷锟斤拷锟�——锟斤拷锟斤拷师锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷一模锟酵和硷拷锟斤拷模锟斤拷锟斤拷锟斤拷追尾时锟侥凤拷应——锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟较凤拷锟斤拷猿头颅锟斤拷锟斤拷模锟酵ｏ拷锟斤拷锟皆此观诧拷锟斤拷锟角碉拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟皆硷拷锟斤拷锟皆诧拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷
Spencer说锟斤拷“锟斤拷锟角讹拷锟斤拷锟斤拷锟斤拷拥锟叫碉拷锟斤拷锟斤拷锟斤拷锟斤拷锟较凤拷锟斤拷猿锟剿碉拷头颅锟斤拷锟斤拷锟斤拷CT扫锟借。”锟斤拷锟斤拷锟斤拷锟斤拷学锟斤拷锟斤拷锟较伙拷锟斤拷锟斤拷锟斤拷源锟斤拷锟叫撅拷员锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷目锟斤拷锟斤拷要锟斤拷锟斤拷摺锟斤拷锟揭伙拷锟侥匡拷锟斤拷锟斤拷锟斤拷锟斤拷铱锟窖э拷锟斤拷锟斤拷锟脚凤拷锟斤拷锟斤拷锟斤拷锟缴★拷锟斤拷锟矫的凤拷锟斤拷锟较凤拷锟斤拷猿锟剿匡拷锟斤拷锟斤拷露锟斤拷-STS5锟侥猴拷锟斤拷锟斤拷锟饺ｏ拷露锟斤拷-STS5锟斤拷锟斤拷锟斤拷锟斤拷锟叫的筹拷为“锟斤拷锟斤拷斯锟斤拷锟斤拷”锟斤拷锟斤拷一头颅锟斤拷1947锟疥发锟街ｏ拷锟斤拷锟斤拷一锟斤拷隆锟斤拷没锟斤拷锟斤拷锟捷★拷“锟斤拷锟角斤拷锟斤拷些锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷希锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷呛锟斤拷锟斤拷莸锟斤拷锟侥ｏ拷汀锟�
Spencer 锟斤拷锟斤拷说锟斤拷“锟斤拷为锟斤拷锟斤拷锟斤拷锟斤拷锟较凤拷锟斤拷猿锟斤拷锟斤拷锟斤拷锟狡碉拷锟斤拷锟斤拷锟斤拷锟斤拷锟角对猴拷锟斤拷锟缴斤拷锟斤拷锟剿观察，锟斤拷锟斤拷锟斤拷锟斤拷锟角的硷拷锟斤拷锟斤拷喂锟斤拷锟斤拷锟饺伙拷锟斤拷锟揭辉拷锟斤拷锟斤拷氲侥ｏ拷偷锟斤拷小锟酵拷锟斤拷锟揭伙拷趾锟斤拷樱锟解ê铮╋拷锟侥ｏ拷徒锟斤拷斜冉希锟斤拷锟斤拷锟绞癸拷锟斤拷堑锟侥ｏ拷涂锟绞硷拷锟斤拷锟斤拷锟�”
锟斤拷锟斤拷锟斤拷锟斤拷锟�——一锟斤拷锟竭彩碉拷锟斤拷锟斤拷头颅锟斤拷锟斤拷锟酵仿拷锟斤拷锟斤拷锟秸故撅拷锟斤拷锟侥ｏ拷锟揭э拷锟斤拷锟绞蓖凤拷锟斤拷锟斤拷锟斤拷盏锟斤拷锟斤拷锟斤拷锟斤拷约锟斤拷锟斤拷嵌锟斤拷氐锟斤拷娌匡拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟戒并支锟斤拷咬锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟轿的★拷
Spencer说锟斤拷“锟斤拷锟斤拷锟狡猴拷锟斤拷锟斤拷锟斤拷“锟斤拷锟斤拷斯锟斤拷锟斤拷”锟斤拷锟斤拷锟剿★拷
Spencer锟斤拷说锟斤拷“锟斤拷一模锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟角讹拷锟斤拷锟斤拷锟斤拷芯锟斤拷锟斤拷锟街革拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟截碉拷锟芥部锟结构锟斤拷锟斤拷锟节讹拷锟截碉拷锟斤拷食习锟竭讹拷锟轿成★拷前磨锟斤拷锟斤拷锟斤拷锟斤拷莘锟斤拷锟斤拷屎锟斤拷兀锟斤拷约锟斤拷锟斤拷锟斤拷始锟教地革拷锟斤拷锟斤拷磨锟斤拷锟较ｏ拷锟斤拷说锟斤拷锟斤拷时锟斤拷锟角碉拷食锟斤拷要锟斤拷之前锟劫讹拷锟斤拷小锟斤拷锟斤拷锟接和硷拷锟斤拷锟斤拷锟�”
锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟�“锟斤拷硬锟侥干癸拷锟斤拷锟斤拷锟接碉拷一些应锟斤拷食锟斤拷锟斤拷锟斤拷锟斤拷谋锟斤拷实锟斤拷缺锟斤拷锟斤拷时锟斤拷锟角非筹拷锟斤拷要锟斤拷锟斤拷锟斤拷锟斤拷源锟斤拷锟斤拷锟角碉拷锟斤拷一锟叫撅拷锟斤拷示锟斤拷锟街达拷锟斤拷锟矫癸拷锟竭斤拷锟斤拷锟斤拷锟斤拷猓拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷摹锟�”锟斤拷锟斤拷源锟斤拷锟斤拷锟斤拷锟窖� 锟斤拷锟斤拷锟斤拷/锟斤拷锟诫）
锟斤拷锟斤拷锟斤拷锟揭匡拷学院院锟斤拷锟斤拷锟斤拷
PNAS锟斤拷锟斤拷doi: 10.1073/pnas.0808730106锟斤拷David S. Strait锟斤拷Amanda L. Smith锟斤拷
