Only 2% of the Earth's population are natural redheads.
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In the presence of attractive women, men find running easier, take more risks, donate more money, consume more calories, and talk more.
28
Children laugh about 400 times a day, while adults laugh on average only 15 times a day.
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According to the American Society for Microbiology, 90% of women and 75% of men wash their hands after using a public restroom.
170
Humans are capable of running 40 mph according to a study by bio-mechanical expert Dr. Matthew Bundle. Today's fastest man, Usain Bolt, has a top speed of 28 mph.
34
Blonde hair is not exclusive to Europeans. Melanesians of the south Pacific evolved a different gene for blonde hair.
7