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Vaccines prevent between 2.5 and 4 million deaths every year.
There are 20 feet of blood vessels in each square inch of human skin.
According to animal studies, the typical American diet is damaging to the liver and may result in allergies, low energy, digestive problems, and a lack of ability to detoxify harmful substances.
Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
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.