News FocusPaleoanthropology

Swapping Guts for Brains

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Science  15 Jun 2007:
Vol. 316, Issue 5831, pp. 1560
DOI: 10.1126/science.316.5831.1560

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The idea that as our ancestors began to eat more meat, they took in enough calories at each meal to permit their guts to shrink, saving energy from digestion that in turn helped fuel the brain, is getting new support from studies of birds, fish, and primates.