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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The human eye blinks an average of 4,200,000 times a year.
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An average heart beats 100,000 times a day, pumping some 2,000 gallons of blood through its chambers. Over a 70-year life span, that adds up to more than 2.5 billion heartbeats.
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A human being loses an average of 40 to 100 strands of hair a day.
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The adult human brain weighs about 3 pounds (1,300-1,400 g).
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A man's beard grows fastest when he anticipates sex.
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For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
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It is possible for you to survive even after the removal of the spleen, the stomach, one kidney, one lung, 75% of the liver, 80% of the intestines, and almost every organ from the pelvic and groin area.
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