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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).
Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
Computer programs are available that crosscheck a new drug's possible trade name with all other trade names currently available. These programs detect dangerous similarities between names and alert the manufacturer of the drug.
The longest a person has survived after a heart transplant is 24 years.
The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.