re: “Physicists Have Broken The Speed of Light With Pulses Inside Hot Plasma”
I’m going to take the side of the “house” and bet this is _not_ true ... whether it is an observation error, due to a scaling error in some parameter, or some other you-name-it factor, I’ll bet they did not break the light-speed barrier.
The “group velocity” — a wave — exceeded the speed of light. The individual particle velocity did not.