In the context of extending the range of glassy states , there has recently been much interest in the possible 'rejuvenation' of metallic glasses by a variety of techniques. Rejuvenation is the opposite of relaxation, and involves taking the glass to a state of higher energy (that would be characteristic of formation by quenching from the liquid at a greater rate). Rejuvenated metallic glasses are of interest for several reasons, but principally because they exhibit better plasticity. Both experimental studies and atomistic simulations have advanced our understanding of rejuvenation, its mechanisms, its potential, and its limits. This presentation reviews the recent work and identifies priorities for future work.  YH Sun, A Concustell, AL Greer, Thermomechanical processing of metallic glasses: extending the range of the glassy state, Nature Reviews Materials, 1 (2016) 16039.