@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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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
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Big muscles, heart, long legs, big hands etc do not bring with it obstetric difficulties like large brain does
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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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Then, of course, our brains would have stayed that size. 86 bn neurons needs about 520 kcal to sustain the brain
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