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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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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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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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Vaccines prevent between 2.5 and 4 million deaths every year.
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In 2006, a generic antinausea drug named ondansetron was approved. It is used to stop nausea and vomiting associated with surgery, chemotherapy, and radiation therapy.