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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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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.
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Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.