Rare clouds which have historically been blamed for a number of UFO sightings have been seen over northern skies in the UK. The special cloud formation got its nickname from the smooth ...

What has been observed may look like flying saucers but they are actually lenticular clouds, also referred to by some as pancake or UFO clouds. At their most spectacular around sunrise or sunset ...

Floating high above us, it can be easy to give clouds no more than a second glance. But these vast formations of water vapour and ice particles are as varied as the landscapes they appear in. There ...