The Secret Behind Birds' Brainy Feats Revealed

The next time someone calls you a "bird brain," you may want to plant a big, fat kiss on their overgrown primate noggin. Inch for inch, birds cram more neurons into their pea-size brains than primates do, new research suggests. "For a long time, having a 'bird brain' was considered to be a bad thing: Now, it turns out that it should be a compliment," Suzana Herculano-Houzel, a neuroscientist at Vanderbilt University in Tennessee, said in a statement.