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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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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.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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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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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.