String theory explained in 2 minutes #4d #math #dimensions #stringtheory

String theorists might have you believe that our universe is a 3D brain or a sheet that is embedded in a higher dimensional space of 10 or 11 dimensions. Other brains could be extremely close to ours, but separated in a direction of a higher dimension that is inaccessible to us. The vibrating strings of string theory could be either closed loops or open loops that are like a cut loop with two exposed ends. These ends of open strings might be attached to brains and each end attached to a brain could give rise to a particle that exists there. Because open strings are firmly attached to specific brains, they are confined to the dimensions of the brain which they are bound. Fundamental particles such as the photon and those giving rise to the electromagnetic, weak nuclear and strong nuclear forces might be all confined to our 3D brain because they are from open strings. Since we are made of these particles, we are also theoretically trapped on our 3D brain. Gravity, however, could be a closed string. This uncut loop could bounce between brains and it's not bound to any particular one. We might just experience gravity's ripples. This idea is tempting because gravitons have been too elusive to detect so far. However, string theory introduces its own problems and without claims that can be experimentally tested, it will fall out of favour and be replaced by theories that offer real evidence. This explanation is from page 197 of my book, A Guide to Making Friends in the Fourth Dimension, which you can buy at tibes.com and all copies assigned by me.