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Surprise! Having a big brain really does mean having less muscle

作者:寿冬廑    发布时间:2019-03-01 05:06:15    

Reinhard Dirscherl / Getty By Colin Barras Did primates opt for brains over brawn? Primate species with larger brains have reduced muscle mass, supporting a controversial theory that energy-hungry brains grew larger by stealing resources from other bodily tissues. Brains are expensive to run. Some estimates suggest every kilogram of brain tissue requires 240 kilocalories each day. As such, many researchers have wondered how primates – particularly humans – find the energy to keep their unusually large brains running. An idea emerged in the mid-1990s:

 

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