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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.
There are more nerve cells in one human brain than there are stars in the Milky Way.
Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
Coca-Cola originally used coca leaves and caffeine from the African kola nut. It was advertised as a therapeutic agent and "pickerupper." Eventually, its formulation was changed, and the coca leaves were removed because of the effects of regulation on cocaine-related products.