How Are Clouds’ Shapes Made? Explore the diverse world of cloud formations, from ground-level fog to high-flying cirrus ...

A strange swirl in the sky seen over much of Britain and Europe this week wasn’t the result of alien activity but rather a ...

A rover got a new view of some peculiar extraterrestrial clouds, flecked in rainbow colors and moving across the Martian sky. Curiosity, a set of NASA's robotic "eyes" on the Red Planet ...

Watch: This photographer's footage of a double rainbow, as seen from a trail in the Golden Gate National Recreation Area, ...