A UFO-shaped cloud created quite the dramatic scene over eastern China on Tuesday, with photographers and residents flocking to catch a glimpse of the unusual sight. The cloud formation, known as ...

A rare cloud formation was spotted over parts of Ontario and Quebec on Sunday, Oct. 6. These unique formations, known as asperitas clouds, have a wave-like appearance, resembling a rough sea ...

Lenticular clouds were seen above the W. M. Keck Observatory on March 8, hovering in the skies above the Mauna Kea and Mauna Loa volcanoes.

A UFO-shaped lenticular cloud stunned onlookers in Lianyungang, China, but forecasters say it was likely a result of the terrain. These clouds form when waves of moisture and mountain terrain ...