It's a Bird, a Plane, a UFO? It's a... Red Sprite

Is it a bird, is it a plane, is it a UFO? Strange lights in the sky are being closely watched by atmospheric scientists. Dubbed red sprites by researchers, these dancing fairies-of-the-clouds are sometimes glimpsed as blood-red bursts of light in the shape of jellyfish. At other times, they appear as trumpet-shaped blue emissions, [...]