New research suggests the reason why human brains grew more than those of other animals living in challenging environments. — AFP
The human brain is disproportionately large. And while abundant grey matter confers certain intellectual advantages, sustaining a big brain is costly – consuming a fifth of energy in the human body.
It is an oddity that has long flummoxed scientists – while most organisms thrive with small brains, or none at all, the human species opted to sacrifice a degree of body growth for more cerebral capacity.
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