LiveScience.com – Light Travels Backward and Faster than Light
It sounds nuts, but a scientist says his team has made light go backward. And this is not a simple trick of mirrors.
Previous work has slowed light to a crawl. But in the new research, a pulse of light is given a negative speed andâ€”as if just to make your head spinâ€”the researcher says the experiment made light appear to exceed its theoretical speed limit. Link