The idiom "out of the blue," used to describe something unexpected, is derived from a potentially deadly weather phenomenon —a "bolt from the blue." According to the National Weather Service, a "bolt ...

Talk about a bolt from the blue. Scientists July 31 announced the discovery of the world's longest lightning flash ever detected – a whopping 515-mile-long bolt that blasted across central U.S. skies ...

Lightning is a familiar sight in stormy skies, but a new report has revealed just how far some bolts can travel — in one case, more than 500 miles. That astonishing bolt sparked to life in eastern ...

A super-sized lightning bolt struck scientists as something special. Now, researchers have confirmed that a lightning strike from 2017 has broken a world record. A single flash of lightning that ...