arguing with a Celsius fan that zero should be moved to −259.16°C and 100 moved to −252.879°C as these are the freezing and boiling points of Hydrogen, the most abundant substance in the universe
@robryk I believe that is at standard atmospheric pressure. but maybe that should be adjusted since most of the universe is at a lower pressure? 
Yeah, I wanted to suggest that if we consider water to be arbitrary, then we should consider standard pressure even more so.
I was surprised that hydrogen's triple point is at less than 0.1atm (https://www.engineeringtoolbox.com/docs/documents/1419/Hydrogen%20phase%20diagram.jpg)
