Though sun halos can happen year-round, they are especially noticeable in the winter when ice-filled cirrus clouds are more common.

Unpredictable bursts of light are pulsing from the debris surrounding Sagittarius A*, offering new insights into the ...

And that may be why it’s surprising that so few people know about the Point Fermin Lighthouse, on an especially picturesque ...

There's a place on Earth where lightning flashes almost every night—until, one day, it stopped. What causes the Catatumbo ...