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The record for high-temperature superconductivity has been smashed again - MIT Technology Review

https://www.technologyreview.com/s/612559/the-record-for-high-temperature-superconductivity-has-been-smashed-again/

Eremets and his colleagues say they have observed lanthanum hydride (LaH10) superconducting at the sweltering temperature of 250 K, or –23 °C.