We like the sunken square box in the middle of the table, added for storage, which gives the table an almost whirlpool - like illusion of motion. (treehugger.com)
This expansion evokes the illusion of motion, making the patients feel as though «they've just gotten off a merry - go - round,» Minor says. (sciencemag.org)
More impressive still, they may even have invented animation, using discs of bone to create the illusion of motion, much like a modern flip book. (newscientist.com)