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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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Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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Illicit drug use costs the United States approximately $181 billion every year.
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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.