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Sometime between three million and two million years ago, perhaps on a primeval sa

Sometime between three million and two million years ago, perhaps on a primeval sa

Sometime between three million and two million years ago, perhaps on a primeval sa

Most large animals have to chew food extensively and form it into a mushy ball that’s easy to swallow. Cooking makes a huge difference--it softens the food and dramatically reduces eating time.

MINNEAPOLIS--It’s a great irony of paleoanthropology that for all the insights scientists have been able to glean from the fossil record about our early ancestors, the australopithecines (Lucy and her kin), they have precious little to document the origin of our own genus, Homo. They know that Homo descended from one of those australopithecine species, and that over the course of that transition our ancestors evolved from chimp-size creatures with short legs and small brains into tall humans with long legs and large brains, among other hallmark traits

Looking beyond obvious causes of obesity like overeating, scientists said on Wednesday they may have found a gene that also plays a role, one that helped our ancestors survive famines.