Daniel Lieberman: Humans Evolved Big, Costly Brains

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Daniel Lieberman from the Department of Human Evolutionary Biology at Harvard University explains how humans, with our big, "thirsty" brains, evolved to need more energy.
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Humans have the largest of brains in the animal kingdom. It comes at a big price for the enormous energy it needs to sustain itself.

Here is Prof.Daniel Lieberman on this interesting topic:
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