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There are more nerve cells in one human brain than there are stars in the Milky Way.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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The oldest recorded age was 122. Madame Jeanne Calment was born in France in 1875 and died in 1997. She was a vegetarian and loved olive oil, port wine, and chocolate.
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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.