Learn about Clouds, the sailors of the sky, with this detailed and informative poster fromDiscovermagazine. Drops. That’s all there is to clouds – they’re made from countless water drops too small to see with the naked eye. Learn about the 10 cloud genera identified by the American Meteorological Society, the impact of clouds on our climate, and the anatomy of a supercell – an outsize cumulonimbus cloud with a rotating updraft.Size: 10.5″ x 32″ (folded 10.5″ x 16″)