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

Unusually Red or Purple Sunsets and Sunrises One of the most enchanting sights in nature is a vividly red or purple sky ...

Posted to the World Meteorological Organization's Facebook page as well as other social media sources, the photos show a massive lenticular cloud perched atop Mount Etna on June 14. SEE ALSO ...

They can occasionally appear flat and layered, so some people also call them pancake clouds. However, their official term is lenticular clouds, which comes from a Latin word that means "lens-like." ...