Dolphins have names for one another.
18
Poor eyesight (myopia) is associated with higher IQ.
232
In 1996, research found that having excessive body hair is linked to higher intelligence.
23
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
In the US, people can be rejected from joining the police force if they are too intelligent.
45
People who are more likeable and attractive are generally perceived as more intelligent. This is called the “Halo Effect.”
13