"Impossible objects" are revealed to be "possible ... geometry-defying objects warns us of the potential dangers of optical illusions in our lives.” An "ambiguous object" is one with different ...

You’ll notice that physically it is an impossible object ... the infinite stair puzzle that is exposed as an optical illusion. [David’s] proposed method for debunking this hoax uses a similar ...

Thus, despite appearances, the elephant effectively has one intact leg, with the rest manipulated to create the illusion of ...