  The long-sought goal of room-temperature superconductivity has reportedly
recently been realized in a carbonaceous sulfur hydride compound under high
pressure, as reported by Snider et al. [1]. The evidence presented in that
paper is stronger than in other similar recent reports of high temperature
superconductivity in hydrides under high pressure [2-7], and has been received
with universal acclaim [8-10]. Here we point out that features of the
experimental data shown in Ref. [1] indicate that the phenomenon observed in
that material is not superconductivity. This observation calls into question
earlier similar claims of high temperature conventional superconductivity in
hydrides under high pressure based on similar or weaker evidence [2-7].
