Most people smile when they are frustrated, according to a study.
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Most of us have microscopic, worm like mites named Demodex that live in our eyelashes and have claws and a mouth.
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Identical twins do not have identical fingerprints.
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Senegalese women spend an average of 17.5 hours a week just collecting water.
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The average American eats at McDonalds more than 1,800 times in their life.
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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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