Black holes are some of the most perplexing objects in the entire Universe. Objects so dense, where gravitation is so strong, that nothing, not even light, can ever escape from it. Many physical black holes have been identified, from stellar-mass scale ones in our own galaxy to supermassive ones at the centers of the majority of galaxies, many millions or even billions of times the mass of our Sun. The key property surrounding the event horizon, that light can never escape from within it, sets up a boundary in space: once you cross it, you’re doomed to hit the central singularity. But what would you see as you fell in? Would the lights stay on, or would the Universe go dark? At last, physics has deciphered the answer, and it’s gorgeous.