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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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Your heart beats over 36 million times a year.
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The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
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More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.
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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.