Why Are Our Brains Are Shrinking?

Illustration for article titled Why Are Our Brains Are Shrinking?

Human brains are now 10% smaller than our Cro-Magnon ancestors', but scientists can't figure out why. Some believe it's a sign of domestication and lower aggression. Others think we're dumbing down, as microwaving Hot Pockets doesn't require much intelligence.


Image via Arcady/Shutterstock.

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No. NO. It's just more brain in a smaller space. Our brains are getting smaller, lighter, more efficient. Just like cell phones and computers. Cro-magnons were like the ENIAC. We're like the Macbook Air.