[AdmSmith]

This might be something:

But scientists say that they have trumped that record using the common molecule hydrogen sulphide. When they subjected a tiny sample of that material to pressures close to those inside Earth’s core, the researchers say that it was superconductive at 190 K (–83 C).

“If the result is reproduced, it will be quite shocking,” says Robert Cava, a solid-state chemist at Princeton University in New Jersey. “It would be a historic discovery.”

http://www.scientificamerican.com/article/superconductivity-record-broken-with-rotten-egg-smelling-compound/

[SunkenCiv]

Thanks, that is interesting. The first time I heard of that compound was during the John Wayne movie “Hellfighters”. :’)