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Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.

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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.

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Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.

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Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).

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For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

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The Blue-bearded Bee-eater Nyctyornis athertoni is a large species of bee-eater found in South Asia. The Blue-bearded Bee-eater Nyctyornis athertoni is a large species of bee-eater found in South Asia.
Leonardo da Vinci, Study of Human Proportion: The Vitruvian Man. Leonardo da Vinci, Study of Human Proportion: The Vitruvian Man.
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