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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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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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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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Thyroid conditions may make getting pregnant impossible.
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Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.