50.Oil and water: The swirling, colorful patterns created by mixing oil and water. .

49.A cow wearing roller skates and a tutu, balancing on a tightrope over a circus crowd. .

48.Watch mechanisms: A close-up of the tiny gears and springs inside a wristwatch. .

47.A herd of glowing, translucent deer grazing in a moonlit meadow. .

46.A shark riding a bicycle through a busy city street, with pedestrians staring in disbelief. .