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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
There are more sensory neurons in the tongue than in any other part of the body.
If you could remove all of your skin, it would weigh up to 5 pounds.
In 1844, Charles Goodyear obtained the first patent for a rubber condom.
The longest a person has survived after a heart transplant is 24 years.
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