Researchers Say Blood-Thirsty Brains Key To Evolution Of Human Intelligence

Sarah Benton Feitlinger
Tue, 04 Oct 2016 12:41:13 -0700

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.