Poor eyesight (myopia) is associated with higher IQ.
232
Crows living in some urban areas drop nuts into traffic to let the passing cars crush them, then they wait for the red lights to stop the traffic so they can grab and eat it.
17
Intelligent men tend to be more sexually faithful.
31
Intelligent people have more zinc and copper in their hair.
233
There’s a bonobo named Kanzi who has learned to build a campfire and cook his own food.
8
Forty percent of American adults cannot fill out a bank deposit slip correctly.
155