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Did you know?
Vaccines prevent between 2.5 and 4 million deaths every year.
Did you know?
Liver spots have nothing whatsoever to do with the liver. They are a type of freckles commonly seen in older adults who have been out in the sun without sufficient sunscreen.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.