People who are more likeable and attractive are generally perceived as more intelligent. This is called the “Halo Effect.”
13
Poor eyesight (myopia) is associated with higher IQ.
232
There’s a bonobo named Kanzi who has learned to build a campfire and cook his own food.
8
In the US, people can be rejected from joining the police force if they are too intelligent.
45
Intelligent people have more zinc and copper in their hair.
233
The world's smartest pig, owned by a mathematics teacher in Madison, WI, memorized the multiplication tables up to 12.
264