In 1996, research found that having excessive body hair is linked to higher intelligence.
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You can only remember 4 things at a time.
31
Poor eyesight (myopia) is associated with higher IQ.
232
Dolphins have names for one another.
18
Intelligent people have more zinc and copper in their hair.
233
Awarding people money for doing well in IQ tests causes them to score better, $10 increased people's score by an average of more than 20 IQ points. IQ tests don’t just measure intelligence - they also measure effort.
9