The World’s Oldest Optical Illusion
The image was a sketch of a rabbits head, or was it a ducks head? Both images seemed to switch back and forth from being a duck then being a rabbit. The duck-rabbit illusion is a classic one, but its certainly not the first. The prehistoric artworks found in the cave of Font-de-Gaume, in France, is especially noteworthy. In this piece, both the mammoth and the bison are shown sharing the same contour....