Science, Physics, Technology, Superconductor, Science Communication.
liquid nitrogen. Graph depicting Critical Temperatures of Several Superconductors. Taken from: https://en.wikipedia.org/wiki/High-temperature_superconductivity#/media/File:Timeline_of_Superconductivity_from_1900_to_2015.svg Superconductors 101, from Hg to LK-99 Mercury (Hg): Mercury was the first