Soon after the introduction of the Bardeen-Cooper-Schrieffer (BCS) theory in 1957, which describes the phenomenon of superconductivity through electron-phonon coupling, the use of metallic hydrogen as a high-temperature superconductor under high pressure was suggested. A tremendous amount of subsequent research has focused on group IV hydrides, e.g., silane and disilane, as the abundance of hydrogen in these systems makes them "chemically precompressed". However, it must be noted that hydrides of various elements are intensively investigated as well. Among them, polyhydrides Figure : Hydrides of various elements in the periodic table, with color indicating the theoretically predicted superconducting critical temperature T c (in Kelvin). Gray frames represent the fraction of H 2 in the hydride compound. If an element is not highlighted in color, it signifies that the element is not a hydride superconductor. Reproduced with permission from Zurek and Bi, Copyright 2019, AIP Publishing.