Physicists have long known how lightning ends, in a blinding discharge that can heat air hotter than the surface of the Sun, but the precise trigger that starts a bolt inside a cloud has remained ...

An obscure quantum-mechanical phenomenon involving a warm glow visible only to accelerated observers, long thought almost impossible to detect, should be measurable in the laboratory after all. So say ...

Researchers say they've found a way to significantly increase the probability of observing the Unruh effect, a 'quantum glow' phenomenon that was first proposed in the 1970s. For "Star Wars" fans, the ...

Edie Widder sat quietly in the dark for half an hour. All around her, critters floated and glided by as she peered through the thick glass bubble of a submersible, perched on a rocky ledge nearly ...