I would recommend seeing this beautiful abstract video in full-screen mode. Do the images remind you of the iris of the eye? Or are these images of space nebula? The point is that they do look alike, as if there is some great cosmic design that links them together. The movement of the images is mesmerizing, and may make you feel as if you are on some peaceful but mind-expanding theme park ride.
Ruslan Khasanov edited together hundreds of high-resolution stills to make the video Space Iris. According to Colossal, he uses the movement and interaction of liquids that don't quite blend, like water, oil, and paint to create his images. (via Kottke)