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Frame of reference. Kelvin immediately tells you the distance from absolute zero, which is at least somewhat relevant in this context. Celsius tells you the distance from liquid water which isn't very helpful in understanding the figure.

I think fewer people know the offset between K and C than the fact that 0K represents absolute zero.



For the layman, 0 degrees celsius is also a good proxy for the distance to "room temperature" superconductor.


-196℃ is another point of reference that might be familiar to people interested in, ehm, cold.


Nitrogen melting point. Essentially the highest low temperature at which you can cheaply do supercold stuff.


(I meant nitrogen boiling point.)




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