Scientists are working to understand the curious phenomena of red sprites, green ghosts and blue jets high above ...

Jupiter, the largest and most mysterious planet in our solar system. A gas giant so massive it could swallow 1,300 Earths, ...

NASA astronaut Nichole Ayers captured an electrifying image of a giant lightning "sprite" shooting up over Mexico and southern U.S. states. The red "jellyfish" could help researchers learn more about ...