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Vaccines prevent between 2.5 and 4 million deaths every year.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.
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Illicit drug use costs the United States approximately $181 billion every year.
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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).