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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
There are more sensory neurons in the tongue than in any other part of the body.
Your heart beats over 36 million times a year.
Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
If you could remove all of your skin, it would weigh up to 5 pounds.
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