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The human body produces and destroys 15 million blood cells every second.
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The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.
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Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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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.