Scientists created an artificial event horizon of a black hole inside an optical fiber. Left: A microstructured optical fiber in which laser light is converted into a broad spectrum of visible light, or a "supercontinuum." This light is partially leaking out of the fiber cladding. Right: Detail of the supercontinuum output from the microstructured fiber dispersed by a prism and projected onto the screen. The picture shows that the supercontinuum contains all colors of the rainbow. Image courtesy of Chris Kuklewicz
