Members of the Cloud Appreciation Society proudly walk around with their heads in the clouds. Founded in 2005, the group — which is comprised of more than 48,000 cloud marvellers and spans 120 ...

To form a fallstreak hole, the cloud layer must consist of supercooled droplets – that is, water is in liquid form – even though temperatures at cloud level are well below 0° celsius.

It’s mostly lasers and big black boxes. But the behavior of these lab-based cloud particles mimics the behavior of cloud particles in massive sky-sweeping clouds, only in miniature. “Of course, we don ...