Ever sit outside on a warm summer's evening and notice flashes of lightning, but no actual rain clouds near you? This is commonly referred to as "heat" lightning. While it's not uncommon to see these ...

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 ...

On a cold, thin-aired world where sound barely carries, a NASA rover has picked up something that should not be possible: the crackle of lightning on Mars. Instead of the deep, rolling thunder ...