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
The higher someone’s I.Q. the more likely they are to be sleep deprived.
29
Poor eyesight (myopia) is associated with higher IQ.
232
In the US, people can be rejected from joining the police force if they are too intelligent.
45
You can only remember 4 things at a time.
31
There’s a bonobo named Kanzi who has learned to build a campfire and cook his own food.
8