The adult human brain weighs about 3 pounds (1,300-1,400 g).
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You can't tickle yourself.
29
Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
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Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
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Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
307
Having sex can make a woman look younger and more attractive due to the release of estrogen and collagen.
346
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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The human eye blinks an average of 4,200,000 times a year.
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