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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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The human body produces and destroys 15 million blood cells every second.
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Colchicine is a highly poisonous alkaloid originally extracted from a type of saffron plant that is used mainly to treat gout.
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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).