Divergence and curl: The language of Maxwell's equations, fluid flow, and more

(See below for small-but-important error correction) More thoughts from the end: Special thanks: Error: At 4:55, the narration should say “counterclockwise rotation gives positive curl, clockwise rotation gives negative curl“. The diagram is correct, though. My former work on divergence and curl at Khan Academy: For more fun fluid-flow illustrations, whic