A dramatic video showing a "roll cloud" over a beach in Portugal is going viral on social media, leaving netizens mesmerised.

In Zhuque National Forest Park, the uploader saw a breathtaking sea of clouds. The misty expanse stretched as far as the eye could see, enveloping the trees in a dreamy, ethereal atmosphere. This ...

Clouds are made mostly of water, but not entirely. Each water droplet or ice crystal that makes up a cloud forms around a tiny airborne particle no more than one micrometer in size. (That’s ...