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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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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.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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According to animal studies, the typical American diet is damaging to the liver and may result in allergies, low energy, digestive problems, and a lack of ability to detoxify harmful substances.
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Your heart beats over 36 million times a year.