Amazing optical illusion and Spirograph David Pescovitz 8:56 am Fri, Jul 25, 2014 Phil "Bad Astronomy" Plait deconstructs Brusspup's "Crazy Circle Illusion" and ties it to the wonderful classic art/science/toy Spirograph.
Phil "Bad Astronomy" Plait deconstructs Brusspup's "Crazy Circle Illusion" and ties it to the wonderful classic art/science/toy Spirograph.