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Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).
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It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.
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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.