3. The Universe Is A Hologram
A hologram is essentially a 3D projection of an image on a 2D surface made up of teeny dots. You've probably got a hologram in your wallet right now, as they're often used to prevent people counterfeiting credit cards and banknotes, but there are some out here who think that you, your wallet and the entire universe might also be holographic. Traditional physics describes spacetime as a four-dimensional structure in the form of smooth curves. However, quantum physics says that when you get up close to the fabric of the universe, it's actually made up of tiny grains that look an awful lot like the dots of a hologram. What's more, if you try to combine Einstein's relativistic and the spooky quantum descriptions of spacetime, you always end up a dimension short. Mathematically speaking, the universe is actually a three-dimensional projection existing on a two-dimensional plane. Could the real reason we have so much trouble marrying quantum and Einsteinian physics be that we're missing a dimension?