Fatto generale: 273 is the zero of the Celsius temperature scale (to the nearest whole number) in Kelvin.
Fatto matematico: 273 is a boring number.
Trivia: 273 is the zero of the Celsius temperature scale (to the nearest whole number) in Kelvin.
Data storica: September 29th is the day in 522 BC that Darius I of Persia kills the Magian usurper Gaumâta, securing his hold as king of the Persian Empire.