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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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There are more sensory neurons in the tongue than in any other part of the body.
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More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.
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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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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.