Faster Than Light! Incredible Illusion Makes Images 'Time Travel'

Taken together, the results finally prove a century-old prediction made by British scientist and polymath Lord Rayleigh. Lord Rayleigh — the brilliant British physicist who discovered the noble gas argon and explained why the sky is blue — also made a bizarre prediction about sound waves nearly a century ago. Rayleigh reasoned that, because the speed of sound is fixed, an object traveling faster than that while spewing out sound would result in sound waves that would seem to travel i