Study: Humans Getting Dumber. (VIDEO)

"Just look at all the amazing innovations modern technology has given us: at-home HIV tests, motion-activated screwdrivers and self-inflating tires. It's easy to look down on our prehistoric ancestors for their primitive, electric screwdriver-less way of life. But one scientist says we shouldn't be so quick to judge.

In a two-part paper published in the journal Trends in Genetics, Stanford University researcher Gerald Crabtree suggests that evolution is, in fact, making us dumber — and that human intelligence may have actually peaked before our hunter-gatherer predecessors left Africa."*

John Iadarola (TYT University) and Lisa Fergusson (Current TV) discuss a study that concludes humans are gradually becoming less intelligent.