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Thread: Human Evolution As Measured by Brain Blood Flow Rates

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    Human Evolution As Measured by Brain Blood Flow Rates

    I have no problem with the premise or conclusions of this article. What I would like to point out is the graph. According to the graph A. boisei, "H." naledi, and A. africanus all had brain blood flow rates higher than "H."georgicus. The quotation marks are my way of saying they are inappropriate. H. georgicus is just a good looking Australopithecine.


    http://www.dogonews.com/2016/10/4/re...n-intelligence

    Researchers have long attributed the evolution of human intelligence to the size of the brain. It turns out that while a larger skull certainly helped, it was the extra blood sucked in by the brain that transformed humans into one of Earth’s smartest species. The surprising revelation that overturns the previous, long-standing theory, comes from a team of scientists at the University of Witwatersrand in South Africa and the University of Adelaide in Australia.

    Led by University of Adelaide Professor Roger Seymour, the group examined several different Hominin fossil skulls ranging from the 3 million-year-old Australopithecus to those of modern humans. However, they did not focus on the size of the head. Instead, the scientists carefully measured and documented the diameter of the holes at the base of each skull that accommodate the blood-delivering arteries.

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    Well common sense says an organ needs a blood supply?

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