What are clouds? How are they formed? What are the different types?
Clouds come in all shapes and sizes. They can be beautiful, unusual and even destructive. Some rare cloud forms have even been mistaken for UFOs.
Luke Howard was the first person to name some of the different cloud types we see in the sky. Learn more about him and the fascinating world of clouds in the film below.
You'll also discover some incredible facts along the way. Did you know that some clouds can hold up to half a million tonnes of water?