The most otherworldly, mysterious forms of lightning on Earth
Our atmosphere is like one big electrical circuit: Thunderstorms are the batteries that charge it up, and lightning is the current flowing through it. On the ground we see evidence of this circuit when lightning cracks and strikes the ground, or when it lights up deep inside a thundercloud, but high above the clouds lies a secret electrical zoo full of sprites, elves, and jets. These fantastical terms refer to light displays called transient luminous events or TLEs that occur in Earth’s upper a