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Did you know?
Approximately 500,000 babies are born each year in the United States to teenage mothers.
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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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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 1864, the first barbiturate (barbituric acid) was synthesized.
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