我们曾经并不孤单

今天,我们理所当然地认为智人是地球上唯一的人科动物。然而,至少在四百万年的时间里,许多人科物种共同生活在这个星球上。是什么让我们与众不同?

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SA Special Editions Vol 13 Issue 2sThis article was originally published with the title “Once we were not Alone” in SA Special Editions Vol. 13 No. 2s (), p. 20
doi:10.1038/scientificamerican0503-20sp
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