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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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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
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The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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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.