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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).
Certain rare plants containing cyanide include apricot pits and a type of potato called cassava. Fortunately, only chronic or massive ingestion of any of these plants can lead to serious poisoning.
Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
Medication errors are three times higher among children and infants than with adults.
The longest a person has survived after a heart transplant is 24 years.