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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.
Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.
People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
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.
The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.