of alkaline earth and rare earth elements generally exhibit high superconducting critical temperature, T c (Figure ), i.e., the maximum working temperature for superconductors. Additionally, Zurek and Bi categorized various hydrogenic motifs, among which the clathrate-based hydrogenic lattices, with the metal atom situated at the center of the cages, tend to have high T c . The high-pressure properties of carbon-rich materials and their pressure-induced synthesis have been studied extensively as well. A DFT study discovered several high-pressure phases of benzene, including molecular and polymeric phases. The study indicates the stability of polymeric benzene phases owing to the dearomatization of the benzene molecule, involving the breaking of π bonds within the benzene ring and the formation of intermolecular σ bonds. However, it is worth noting that the authors pointed out a substantial energy barrier between the molecular and polymeric benzene phases. Furthermore, a mixed experimental/computational study reported the synthesis of carbon nanothread single crystals from benzene via uniaxial compression at room temperature. Carbon allotropes under pressure, e.g., graphite, graphene sheets and crystals, and diamond have been intensively studied using diverse simulation techniques. In a recent study, DFT simulations predicted a metallic, superconducting carbon allotrope with significant hardness that could be accessible at high pressure. The effect of pressure on biological systems is an intriguing topic that shall briefly be mentioned here.