Remember that episode of Star Trek: The Next Generation where Professor Moriarty tried to escape from the holodeck? Well, the folks at Fermilab probably saw it, since they are currently launching a one year series of tests to find out if our entire universe is a hologram. Do we live in a 2D hologram? There’s no short answer, but physicists believe it may be possible. The holographic principle — a property of particle physics’ string theory — proposes that information about a region of space can be ascertained by the information on the surface that surrounds it — much...