Time crystals have been created by two physics labs: http://www.sciencealert.com/scientists-have-just-announced-a-brand-new-form-of-matter-time-crystals
While most matter is in a state of equilibrium, time crystals are not. While ordinary matter may have a crystalline structure repeated in space, like diamonds, time crystals have a structure repeated in time: N. Y. Yao (et al.), “Discrete Time Crystals: Rigidity, Criticality, and Realizations,” Physical Review Letters, January 20, 2017.
Time crystals are capable of perpetual motion without energy. The physicist involved say that they don’t see any applications for this except for quantum computing, but surely there is the possibility here of energy machines tapping into the source of perpetual motion. I don’t know how this could be done, but it is certainly worth exploring.
What a pity that physics students in Australia are being dumbed down by “feminised” physics: http://www.smh.com.au/technology/sci-tech/australia-day-address-orator-michelle-simmons-horrified-at-feminised-physics-curriculum-20170124-gtxoi2.html
They could be working on superhero weapons.