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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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Excessive alcohol use costs the country approximately $235 billion every year.
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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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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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Blood is approximately twice as thick as water because of the cells and other components found in it.