http://www.nature.com/nature/journal/vaop/ncurrent/full/nature14964.html http://arxiv.org/abs/1506.08190 http://arxiv.org/abs/1412.0460 Now Tc=203 kelvin, allegedly, in H2S, but only at 90-150 GPa pressure achievable only in tiny samples inside a diamond anvil. Building confidence in their claim is observation of isotope shift to lower Tc when H is changed to deuterium, and the fact they've observed the superconductivity 2 ways: direct resistance and Meissner effect (but in different experiments). They speculate that other hydrogen-rich compounds converted to metals by pressure, might also be superconductive with high Tc. When they aren't experiencing cold fusion :)