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RE: Dumb & Dumberer: Why Are Human Brains Shrinking?
If our bodies shrank as fast as our brains have been doing in the last 20,000 we would have to be the size of pygmies to still have the same ratio of proportional scaling.
Lol. Really? How big were people 20,000 years ago?
It is not a 1-1 ratio. It takes a large amount of the brain just to control all the 'background programs' needed to live. Once you have that complete, you can add mass but the brain doesn't have to grow as much. If someone is 10% bigger, the brain will only need to become a small percentage larger to control that extra mass, nowhere near 10%. So that 10% of our brain that we lost equals us being pygmy sized.
Yes, I was wondering if we are pigmy sized compared to people 20k years ago.
Also, maybe the slower reactions are simply due to toxoplasmosis.