Intelligent people have more zinc and copper in their hair.
233
Dolphins have names for one another.
18
People who are more likeable and attractive are generally perceived as more intelligent. This is called the “Halo Effect.”
13
The world's smartest pig, owned by a mathematics teacher in Madison, WI, memorized the multiplication tables up to 12.
264
Forty percent of American adults cannot fill out a bank deposit slip correctly.
155