Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
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Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
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By weight, Bone is five times stronger than steel.
417
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
Poor eyesight (myopia) is associated with higher IQ.
232
Unconsciousness will occur after 8-10 seconds after loss of blood supply to the brain.
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