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Did you know?
Asthma cases in Americans are about 75% higher today than they were in 1980.
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.
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There are 60,000 miles of blood vessels in every adult human.