Kalliroscopes are devices that use rheoscopic fluids to create swirling vortexes. They were invented by artist Paul Matisse (grandson of Henri Matisse) and they mimic some of the universe’s greatest natural wonders like hurricanes and galaxies. Because of that, they can help in the study of fluid dynamics.
Kalliroscopes use mica, metallic flakes, or even fish scales suspended in fluid, between two thin chambers to allow movement and visualisation.
Below you can see an example of one in all its majestic beauty.