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In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.
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Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.