“It’s weird stuff,” says Boyd. “We sent a pulse through an optical fiber, and before its peak even entered the fiber, it was exiting the other end. Through experiments we were able to see that the pulse inside the fiber was actually moving backward, linking the input and output pulses.”
Robert Boyd, U of Rochester prof. of optics
Interesting to see if/how this can be applied to data transmission, not to mention our understanding of black holes.