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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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Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.
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The liver is the only organ that has the ability to regenerate itself after certain types of damage. As much as 25% of the liver can be removed, and it will still regenerate back to its original shape and size. However, the liver cannot regenerate after severe damage caused by alcohol.
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.