The motion of ferrofluids in magnetic fields is always mesmerizing. Here a ferrofluid has been submerged in a clear alcohol-based solution in a shallow dish while a permanent magnet is used to perturb the liquid. Instead of forming its distinctive spikes due to the normal-field instability, the fluid forms ribbons and mazes due to the shifting magnetic field and the surrounding fluid.
Ferrofluid maze
Literally amazing. Thanks to the wonderful Gwyneth VZ Anderson for sharing this!
so cool!
This is highly relevant to my interests.