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Did you know?
There are more nerve cells in one human brain than there are stars in the Milky Way.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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The familiar sounds of your heart are made by the heart's valves as they open and close.