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Did you know?
Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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There are 20 feet of blood vessels in each square inch of human skin.
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Asthma cases in Americans are about 75% higher today than they were in 1980.