"Paleo diets" are usually based on the meat-heavy eating habits of our Stone Age ancestors. Now, though, researchers are realizing that diets of ancient times are not universal and not necessarily heavy in meat consumption. One way to find answers is studying the few remaining hunter-gatherer communities. "If we want to glean any information on what a nomadic, foraging lifestyle looks like, we need to capture their diet now," says Alyssa Crittenden, a nutritional anthropologist.

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