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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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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.
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The longest a person has survived after a heart transplant is 24 years.
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The average adult has about 21 square feet of skin.