Colorful noctilucent clouds were spotted in the Martian sky on Jan. 17 as NASA's Curiosity ... Earth's atmosphere and are most commonly seen in the summer months near the planet's poles.

During spring and summer, we are more likely to get clouds that are born on rapidly rising thermals of moist air.

Kelvin Helmholtz clouds are named after the two scientists who studied the physics behind them A rare cloud formation resembling waves in the sky has been seen across North Yorkshire. The billowy ...

Have you ever wondered how clouds stay in the sky? Here's your answer, and by the way, the weight of an actual cloud might ...

Puffy to wispy, barely there or dark and menacing, clouds come in many shapes and sizes. Each tells a story about what’s ...