Have you ever looked up at the sky and been struck speechless by a cloud so strange it seemed like a message from another ...

UFO -shaped cloud displays have appeared over the sky in a rare sight for parts of the UK. Several UFO sightings over northern skies in the UK have previously been explained by these cloud formations.

The formation and its name were officially recognized in 2009, the NWS said, decades after the previous addition to the International Cloud Atlas of the World Meteorological Organization in 1951.

The circular or elliptical gaps in the cloud cover appear to be punched out from the sky. Here's what causes them.

TRI-CITIES, Tenn. (WJHL) — News Channel 11 viewers captured stunning, rare clouds in the Tri-Cities Sunday. The formations are called “undulatus asperatus,” which loosely translates to … ...

Stunning pictures show strange, apocalyptic-looking clouds in the sky after strong winds and heavy rain battered the UK. The eerie-looking mammatus clouds were snapped hovering over Preston, Lancs ...

Northern parts of the UK have been treated to the stunning sight of lenticular clouds. Matt Taylor explains how they form.

The clouds above Maine on April 23 were dark, swirling, and undulating, perhaps suggesting a psychedelic landscape painting — Salvador Dali meets Frederic Church? The eerie cloud formations also ...

A cloud that resembles a UFO has been spotted in the same location for more than 100 years. The phenomenon occurs around the Taieri Plain, an area of agricultural land, to the south west of ...

They look like a stunning Impressionist masterpiece or mother of pearl in the sky. And while nacreous clouds are usually a rare sight in the UK, they've been spotted across Britain this week ...

A rare wave-shaped cloud formation has been captured over the skies of England. Joy Patrick noticed what's known as a Kelvin-Helmholtz cloud hovering in the sky above Trimingham, Norfolk on Sunday ...

UFO -shaped cloud displays have appeared over the sky in a rare sight for parts of the UK. Several UFO sightings over northern skies in the UK have previously been explained by these cloud formations.