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Cro Magnon skull shows that our brains have shrunk
(PhysOrg.com) -- A new replica of an early modern human brain has provided further evidence for the theory that the human brain has been shrinking. The skull belonged to an elderly Cro Magnon man, whose skeleton is called Cro Magnon 1. The entire skeleton was discovered in 1868 in the Cro Magnon...
According to barcamgtow , Cro magnon had a similar brain to body ratio as modern Asians do today.
Irish and Norwegians also have a significantly bigger brain to body size ratio .
More bigger brains need more calories it needs 20 to 25 % of energy that bodies use.
Koalas are very dumb animals they evolved smaller brains to body size to adapt to scarce food sources
