Where is all the antimatter?
Actually where all the antimatter went is one of the biggest puzzles in physics. It should have been produced in equal quantities with matter during the big bang (and particle accelerators always produce an equal mix of matter and antimatter when they try to replicate the circumstances). Antimatter is a lot like matter. From a distance it would look the same. It would also have gravity of it’s own; that’s an unrelated bunch of weirdness. What makes antimatter odd is that it’s backwards. The “electrons” are positive and the “protons” are negative. Everything also spins the other way round and has an opposite magnetic moment. When two ordinary atoms bump into eachother not much happens. Like charges repel and the electrons on the outside of every atom repel every other atom. When antimatter meets matter there’s no such protective force. The electrons and positrons (positive electrons) meet and both get turned into pure energy. Then the unprotected nuclei meet and both of those get turned
