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Did you know?
The human body produces and destroys 15 million blood cells every second.
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More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.