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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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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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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
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The strongest synthetic topical retinoid drug available, tazarotene, is used to treat sun-damaged skin, acne, and psoriasis.
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Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.