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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Yawns are more contagious among people with closer relationships.
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It is estimated that at any one time, 0.7% of the world's population are drunk.
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Touching a teddy bear can make people feel less lonely.
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Intelligent people have more zinc and copper in their hair.
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There's an isolated tribe in Zimbabwe where the people have only two toes, dubbed the 'ostrich people'.
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