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Did you know?
Asthma cases in Americans are about 75% higher today than they were in 1980.
Did you know?
The liver is the only organ that has the ability to regenerate itself after certain types of damage. As much as 25% of the liver can be removed, and it will still regenerate back to its original shape and size. However, the liver cannot regenerate after severe damage caused by alcohol.
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There are 20 feet of blood vessels in each square inch of human skin.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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The familiar sounds of your heart are made by the heart's valves as they open and close.