This brain-frazzling optical illusion is enough to put your head into a spin. The purple-and-yellow image looks as though it’s both three-dimensional and moving but is in fact stationary and flat.

This spooky season, the Museum of Illusions Philadelphia is offering both tricks and treats, as it transforms with eerie decor and gives out free candy to guests. The optical illusion museum, located ...

Artists and scientists have been creating optical illusions for centuries. Here are 35 mind-bending examples that prove you can't always trust what your eyes are telling you. When you purchase through ...