Who doesn't remember spending spring and summer days lying in the cool grass and pointing out fun cloud shapes to your friends? (thespruce.com)
Such cloud shapes, familiar as they are, arise from fluid dynamics so complex that a research scientist could spend her entire career attempting to model them. (discovermagazine.com)
The other day someone sent me a photograph of clouds shaped like what was supposed to be God's head. (nakedpastor.com)