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Thyroid conditions may make getting pregnant impossible.
There are approximately 3 million unintended pregnancies in the United States each year.
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.
About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.
Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.