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My Idea Of How Apes Turned Into Humans


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9 hours ago, write4u said:

The timeline shows that Sasquatch appeared several million years before the fusion of chromosome 2 which split Homo Sapiens and Neaderthals from all other hominids and is peculiar only to humans.

Yes, and also this: https://www.hhmi.org/news/meet-three-new-genes-may-have-influenced-human-brain-size and also this: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6092419/ but keep in mind that it isn't just brain size, it the amount of neuronal development in the neocortex. That's what underlies the production of more progenitors both in the womb and in the years after Human birth. All Human neuronal cell growth doesn't happen during fetal development because, if it did, a newborn's head wouldn't pass through the birth canal. So a lot of neuronal development within the neocortex, and subsequent increases in brain size, happens after birth.

It's just all been so fascinating to study this Human dynamic.   

Edited by Evolute
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On 3/15/2021 at 8:09 AM, Evolute said:

It's just all been so fascinating to study this Human dynamic.

Yes, indeed.

I suspect that the brain, instead of increasing in size, evolved more efficient folding thereby increasing the volume of its neural surface area.

An interesting example of increasing surface area may be found in simple clay, which has the largest surface area than any other substance. 1 cm^3 of clay can coat the surface of an entire tennis court. This is what makes it an ideal candidate for mineralogical chemistry.

A wonderful lecture by Robert Hazen (mineralogist) on the evolution of life itself. 

Start viewing @ 12:00 to avoid a lengthy introduction.

 

Edited by write4u
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