The above Escher work, Circle Limit III, was published in 1959, a full 20 years before Benoit Mandelbrot, the creator of the Mandelbrot set, began to study fractals. One can see that the image has an origin of sorts in the very middle, where each fish is perfectly aligned with each other. Once we look further out, we see the pattern becoming more complex and more fish fitting in the same area until the very border of the circle has indistinguishable (but really infinite) repetitions of the same design. If we were to zoom in on one of these tiny designs, we’d see that they go on forever. This is the very essence of recursion and an apt example of a fractal.