Nature’s cosmic hard drive? Black holes could store information like holograms

Nearly 30 years ago, theoretical physicists introduced the "holographic principle," a mind-bending theory positing that our three-dimensional universe is actually a hologram. Now physicists are applying that same principle to black holes, arguing in a new paper published in Physical Review X that a black hole's information is contained within a two-dimensional surface, which is able to reproduce an image of the black hole in three dimensions—just like the holograms we see in everyday life.