The first man to swim the length of Great Britain grew a beard to stop jellyfish stinging his face.
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People with blue eyes are better able to see in the dark.
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Over 98 percent of Japanese people are cremated after they die.
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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.
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Intelligent men tend to be more sexually faithful.
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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.
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