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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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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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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.
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Illicit drug use costs the United States approximately $181 billion every year.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.