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Eldorado

Human brains grew due to animal extinctions

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Eldorado

A new paper by Dr. Miki Ben-Dor and Prof. Ran Barkai from the Jacob M. Alkow Department of Archaeology at Tel Aviv University proposes an original unifying explanation for the physiological, behavioral and cultural evolution of the human species, from its first appearance about two million years ago, to the agricultural revolution (around 10,000 BCE).

According to the paper, humans developed as hunters of large animals, causing their ultimate extinction.

As they adapted to hunting small, swift prey animals, humans developed higher cognitive abilities, evidenced by the most obvious evolutionary change — the growth of brain volume from 650cc to 1,500cc. To date, no unifying explanation has been proposed for the major phenomena in human prehistory.

The novel theory was published in Quaternary Journal.

Full monty at SciTech Daily: Link

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HandsomeGorilla

And as they migrated north, they found a little thing called winter. Whoops. Your entire mindset needed to change or you were going to die. I don't necessarily believe in the Stoned Ape Theory, but that's fun to think about, too :P

 

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Abramelin
On 3/8/2021 at 12:50 PM, Eldorado said:

A new paper by Dr. Miki Ben-Dor and Prof. Ran Barkai from the Jacob M. Alkow Department of Archaeology at Tel Aviv University proposes an original unifying explanation for the physiological, behavioral and cultural evolution of the human species, from its first appearance about two million years ago, to the agricultural revolution (around 10,000 BCE).

According to the paper, humans developed as hunters of large animals, causing their ultimate extinction.

As they adapted to hunting small, swift prey animals, humans developed higher cognitive abilities, evidenced by the most obvious evolutionary change — the growth of brain volume from 650cc to 1,500cc. To date, no unifying explanation has been proposed for the major phenomena in human prehistory.

The novel theory was published in Quaternary Journal.

Full monty at SciTech Daily: Link

https://www.smithsonianmag.com/science-nature/neanderthals-hunted-groups-one-more-strike-against-dumb-brute-myth-180969472/

 

5a9346048a8346000119f054_top-10-interesting-theories-about-cavemen.jpg

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Eldorado

While brain size is important, cognitive abilities are influenced by numerous factors including body size, neuron density and how particular brain regions are enlarged and connected. Some of these variables are unknowable for Neanderthals, as we only have their cranial bones and not their brains. But anthropologists have made the most of these hollow skulls, to learn what they can about the Neanderthal mind.

https://www.discovermagazine.com/planet-earth/neanderthal-brains-bigger-not-necessarily-better

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Abramelin

What I read in the 2d article you posted, Eldorado, is nothing more than educated guesses.

In short: I'm not convinced.

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Eldorado

A new study is the first to identify how human brains grow much larger, with three times as many neurons, compared with chimpanzee and gorilla brains.

The study, led by researchers at the Medical Research Council (MRC) Laboratory of Molecular Biology in Cambridge, UK, identified a key molecular switch that can make ape brain organoids grow more like human organoids, and vice versa.

The study, published in the journal Cell, compared 'brain organoids' - 3-D tissues grown from stem cells which model early brain development—that were grown from human, gorilla and chimpanzee stem cells.

Similar to actual brains, the human brain organoids grew a lot larger than the organoids from other apes.

https://phys.org/news/2021-03-scientists-humans-larger-brains-apes.html

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