Check out the drawing below, which was published around 1892 in a German magazine. Do you see an animal? Do you see two? According to a psychologist, your ability to flip between seeing a rabbit and a ...

5.5 x 7 in. (14 x 17.8 cm.) Subscribe now to view details for this work, and gain access to over 18 million auction results. Purchase One-Day Pass ...

10 x 12 in. (25.4 x 30.5 cm.) ...