Eduardo Brock Signatures of QGP at RHIC and the LHC Takafumi Niida, Yasuo Miake Hide abstract | Show figures | Show BibTeX | Show discussion | View PDF | 2104.11406v1 The progress over the 30 years since the first high-energy heavy-ion collisions at the BNL-AGS and CERN-SPS has been truly remarkable. Rigorous experimental and theoretical studies have revealed a new state of the matter in heavy-ion collisions, the quark-gluon plasma (QGP). Many signatures supporting the formation of the QGP have been reported. Among them are jet quenching, the non-viscous flow, direct photons, and Debye screening effects. In this article, selected signatures of the QGP observed at RHIC and the LHC are reviewed. Authors' comments: 13 pages, 16 figures, review article contributed to AAPPS Bulletin