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Author Question: Around the Grand Canyon the predators of deer were largely exterminated by people. The deer ... (Read 102 times) |
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The familiar sounds of your heart are made by the heart's valves as they open and close.
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Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.
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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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In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.