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Archaeological records show ancient humans sometimes ate each other. A new study suggests that hunting and eating other humans cost too much effort to be a regular thing. So why'd they do it?
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It's gruesome, but from a scientific standpoint, there's a predictable calculus for when humans and animals go cannibal, a new book says. And who knew European aristocrats ate body parts as medicine?
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For decades, a rare disease crawled across Papua New Guinea. When scientists realized what was behind kuru, it caught everyone by surprise. But similar diseases can still be transmitted through food.