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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Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
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On average, there's 100 billion neurons in the human brain.
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Mushrooms are more closely related to humans than they are to plants.
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Enamel is hardest substance in the human body.
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The human brain is more active during sleep than during the day.
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Yawns are more contagious among people with closer relationships.
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A human brain produces as many as 12,000 to 50,000 thoughts per day, depending on how deep a thinker a person is.
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