What's the difference between a nimbostratus and an altocumulus cloud? What about a horseshoe vortex or a contrail? This is what Gavin Pretor-Pinney, Author and Visiting Fellow at The Department of ...

Bridgett Henwood was the executive producer and editorial director of Vox video. If you’re standing outside and you look up, you’ll likely see something familiar above you: clouds! They can be long ...