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The horizontal fraction bar was introduced by the Arabs.
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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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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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Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.
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The average office desk has 400 times more bacteria on it than a toilet.