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Author Question: Among Americans, which ethnic group has the oldest average age at first birth? A) Hispanics B) ... (Read 42 times) |
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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The average adult has about 21 square feet of skin.
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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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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.