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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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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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More than 4.4billion prescriptions were dispensed within the United States in 2016.
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It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.