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Human Evolution

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digital brain reconstructions

ROUNDING OFF  Digital brain reconstructions compare a possible Homo sapiens from around 315,000 years ago (left) with a present-day human (right). Human brains didn’t attain the especially rounded shape observed today until sometime between 100,000 and 35,000 years ago, scientists say.

CT scans of Homo sapiens fossils

GETTING OLDER  Roughly 300,000-year-old fossils from Morocco have been attributed to Homo sapiens. CT scans, used to produce these reconstructions, reveal a modern-looking face (left) but a braincase similar to older, now extinct Homo species (right).

horse leg bone and croc tooth

BIG BITE  Crocodiles in East Africa around 2.5 million years ago had teeth (one shown at right) capable of gouging chunks out of prey animals’ bones. A horse’s leg bone (left), also dating to 2.5 million years ago from East Africa, bears marks more like those of croc bites than butchery with stone tools, as previously suspected, a new study finds.  

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