Several papers have gotten hydrogen-rich chemicals to superconduct at temperatures that could be reached using dry ice.
The room-temperature report followed a similar path, using intense pressure to force hydrogen to combine with a new mix of chemicals and reach record temperatures—in this case, above the freezing point of water, a major milestone.The pressures involved mean the material wouldn't be useful for real-world applications but could potentially point the way toward other chemicals that could.
Nature's editors indicate the procedure used for data processing wasn't included in the paper, which "undermines confidence" in the results.