@KirkegaardEmil @thealthype https://notpoliticallycorrect.me/2017/10/28/microcephaly-and-normal-iq/ … https://notpoliticallycorrect.me/2017/10/24/small-brained-normal-iq/ …pic.twitter.com/6Z24diCJGM
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I agree with you, imo that shows that we don't need large brains for our current IQs.
It makes no sense. Analogous arguments show we don't need big muscles to lift heavy weights, long legs to run fast, be tall to play basket.
Long legs help for running. However the brain has huge metabolic costs. If we could get by with the number of neurons that erectus had,
Then why not? Also large muscles aren't conducive to strength. Sure Mark Rippetoe says 'a bigger muscle is a stronger muscle'
Though powerlifters vs bodybuilders is a good example there. Your examples are nothing like the huge metabolic costs large brains have
Increasing the size of any organ has costs. Nothing unique to the brain about that. The argument applies equally well to all the other cases
Big muscles, heart, long legs, big hands etc do not bring with it obstetric difficulties like large brain does
Erectus had an estimated neuron count of 62 bn neurons. http://m.pnas.org/content/109/45/18571.full … If we could have a brain his size and eat less to power it
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