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The longest a person has survived after a heart transplant is 24 years.
Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.
The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
More than 4.4billion prescriptions were dispensed within the United States in 2016.
When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).