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Did you know?
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
Did you know?
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
Did you know?
Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
Did you know?
If you could remove all of your skin, it would weigh up to 5 pounds.
Did you know?
The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.