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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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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.
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The shortest mature adult human of whom there is independent evidence was Gul Mohammed in India. In 1990, he was measured in New Delhi and stood 22.5 inches tall.
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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.