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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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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
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According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.
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Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.
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Vaccines prevent between 2.5 and 4 million deaths every year.