As Humans Evolve, Our Brains Are Actually Getting Smaller
DATELINE ZERO – Today’s human brain is about 10 percent smaller than the Cro-Magnon brain from more than 20,000 years ago.When it comes to brain size, bigger doesn’t always mean better. As humans continue to evolve, scientists say our brains are actually getting smaller. …
Cro-Magnon man, who lived in Europe 20,000 to 30,000 years ago, had the biggest brains of any human species. In comparison, today’s human brain is about 10 percent smaller. It’s a chunk of brain matter “roughly equivalent to a tennis ball in size,” McAuliffe says.
The experts aren’t sure about the implications of this evolutionary trend. Some think it might be a dumbing-down process. One cognitive scientist, David Geary, argues that as human society grows increasingly complex, individuals don’t need to be as intelligent in order to survive and reproduce. Continue reading, from the original post at DATELINE ZERO.
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