Phil "Bad Astronomy" Plait deconstructs Brusspup's "Crazy Circle Illusion" and ties it to the wonderful classic art/science/toy Spirograph.
David Pescovitz, Boing Boing
Fri, 07/25/2014 - 8:56am
Phil "Bad Astronomy" Plait deconstructs Brusspup's "Crazy Circle Illusion" and ties it to the wonderful classic art/science/toy Spirograph.