Since the discovery of Neanderthals nearly two centuries ago, paleoanthropologists have grappled with an evolutionary mystery: Why did Homo sapiens survive as a species while their stockier cousins ...
A few years ago, a 6-year-old boy was wandering a beach in Southern England when he came across an unusual rock. BEN WITTEN: I saw that rock, and it looked really different to all the other pebbles ...
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