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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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Everyone has one nostril that is larger than the other.
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The shortest mature adult human of whom there is independent evidence was Gul Mohammed in India. In 1990, he was measured in New Delhi and stood 22.5 inches tall.
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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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In Eastern Europe and Russia, interferon is administered intranasally in varied doses for the common cold and influenza. It is claimed that this treatment can lower the risk of infection by as much as 60–70%.