Pushing Light Beyond Light Speed

Warp speed is still out of reach for spaceships, but two new experiments have pushed a pulse of light beyond the speed limit of 300,000 kilometers per second set down in Einstein's theory of special relativity. Although physicists had pulled off similar feats before, two teams now report ways to beat down the loss of light so that much more of it appears to break the universal speed limit. Don't worry, the tricky experiments don't really violate relativity. But the techniques might, in principle, slightly speed up optical communications.