Okay, this quite confuses me. "Energy" isn't anything physical. You can't point at energy. It's more of a property, like length. The definition of kinetic energy is ## ke = .5mv^2##. Now, how can something like an abstract property turn into matter? An example being CERN, when new particles are created from energy when particles with high energy smash into each other. Please let me know if I got something wrong, thanks!