Also known as "blue field entoptic phenomenon" and "blue sky sprites", the little dots move in time with your heartbeat.

Have you ever seen a giant red jellyfish light up the night sky for a split second? If you have, you're not imagining things. You've just witnessed a lightning-like electrical discharge high in the ...

In less time than it takes a hummingbird to flap its wings once, a recently discovered form of high-altitude lightning can come and go, but not before spreading its multiple-branching red streamers ...

A new crowdsourcing science project called "Spritacular" is asking skywatchers to use their digital cameras to try to capture images of unusual electrical discharges above thunderstorms. These ...

When thunderstorms emit lightning, we see the white, snaking electricity from the ground. But if you flew above the clouds, you would see a sky phenomenon known as sprites. These are rarely seen bolts ...

While leading a storm tour photography group in June, photographer Greg McCown captured a rare phenomenon in the sky when red sprites appeared above Windy Point on top of Mount Lemmon. While these ...

Have you ever heard of sprites before? Some new images could be some of the best examples of sprites in photographs. The sprites were associated with Hurricane Matthew. The photos were taken in Puerto ...