Dolphins have names for one another.
18
Intelligent people have more zinc and copper in their hair.
233
Poor eyesight (myopia) is associated with higher IQ.
232
People who are more likeable and attractive are generally perceived as more intelligent. This is called the “Halo Effect.”
13
Intelligent men tend to be more sexually faithful.
31
The higher someone’s I.Q. the more likely they are to be sleep deprived.
29