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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 Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
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Cyanide works by making the human body unable to use oxygen.
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.