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.
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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,
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Replying to @Race__Realist @KirkegaardEmil and
Then why not? Also large muscles aren't conducive to strength. Sure Mark Rippetoe says 'a bigger muscle is a stronger muscle'
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Replying to @Race__Realist @KirkegaardEmil and
Though powerlifters vs bodybuilders is a good example there. Your examples are nothing like the huge metabolic costs large brains have
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Replying to @Race__Realist @RaceRealist88 and
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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Replying to @Race__Realist @KirkegaardEmil and
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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Replying to @Race__Realist @KirkegaardEmil and
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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Replying to @Race__Realist @KirkegaardEmil and
It'd be considerably less if we had erectus brains, and as seen, it's perfectly possible to have normal IQs with erectus brains
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Replying to @Race__Realist @RaceRealist88 and
Hoped for more of a back and fourth tbh.
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Quick back and forth are not a very productive way to do science. This is not a media show.
3:12 PM - 30 Oct 2017
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