Why do inverted faces lose their emotional meaning? Why do certain types of motion induced blindness? How can a few dots on a screen seem meaningless, but once set in motion become easily recognizable biological creatures?

Everyone, from young children to my 94 year-old grandmother are fascinated by optical illusions. During the 20th century vision science has made significant progress thanks to CRT displays and digital programming. Still, current technologies have inherent limits. For more illusions and to understand the science behind them I highly recommend visiting this amazing website.