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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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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
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About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.
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The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.
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Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.