A 'boom' of light that appears when a particle exceeds the speed of light set by a medium could, in other contexts, signal a ...

Flashes like Cherenkov radiation in space may reveal negative-energy ghosts, hinting at gaps in gravity theories.

Applied Physics unveils a new type of warp drive—a theoretical method of space travel that complies with general relativity and operates at a constant subluminal speed without requiring unphysical ...