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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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There are approximately 3 million unintended pregnancies in the United States each year.
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It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.
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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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Human kidneys will clean about 1 million gallons of blood in an average lifetime.