Paleolithic Paleolithic
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Paleolithic

Patrick McGovern, scientific director of the Biomolecular Archaeology Project at the University of Pennsylvania Museum, delves into the early history of fermentation in his latest book. Courtesy of Alison Dunlap hide caption

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Courtesy of Alison Dunlap

Archaeologists have suggested that Stone Age people sometimes ate one another for nutritional reasons. But a new study suggests that from a calorie perspective, hunting and eating other humans wasn't efficient. Publiphoto/Science Source hide caption

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Publiphoto/Science Source

A view inside Grotta Paglicci, in southern Italy, with wall paintings. Scientists say a 32,000-year-old stone found inside the cave was used to grind flour. Courtesy of Marta Mariotti Lippi hide caption

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Courtesy of Marta Mariotti Lippi