Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
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Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
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A third of the human population sneezes when they look at the Sun. Light can signal the ocular nerve near the sinuses and triggers a sneeze.
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Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
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Playing Tetris after a traumatic event can prevent the development of traumatic memories and reduce the chance of having flashbacks.
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Poor eyesight (myopia) is associated with higher IQ.
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The world's shortest man measures only 21.5 inches.
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