The oldest distinguishing feature between humans and our ape cousins is our ability to walk on two legs—a trait known as bipedalism. Among mammals, only humans and our ancestors perform this atypical ...
July 18—The discovery of fossil remains of a hominid that lived in what is now Ethiopia between 5.2 and 5.8 million years ago are the subject of two articles in the July 12 issue of Nature. Hominid ...
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