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Did you know?
The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.
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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
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Everyone has one nostril that is larger than the other.
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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.