In 1892, a German humor magazine published the earliest known version of the "rabbit-duck illusion," in which one can see either a rabbit or a duck, depending on one's perspective—i.e ...

If you see the duck before you see the rabbit, it basically means you are more upbeat and optimistic in life. Rabbit-spotters are generally bright, creative people who concentrate on the positive ...

What animal do you see in the rock? Some see a dog’s snout pointing toward the sea, while others argue it’s a duck’s bill or a rabbit’s ears. This optical illusion has become a delightful ...