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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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Your heart beats over 36 million times a year.
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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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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.