Hello. I know all of the basics of physics (relativity, most basics of quantum physics, and etc) but I can't quite put my finger on the origin of the big bang (as I think most people do). I can't seem to find any decent information on it. How much do we actually know about the origins of the universe? I'm extremely interested in origins, the origins of life has been satisfactorily answered for me (evolution and etc), but the origin of the universe seems to have no real good, definitive answers on it. From what I've uncovered, when the universe began there was large amounts of matter and anti matter which annihilated each other, resulting in the expansion of the universe. There was more matter than anti matter (or antimatter has properties which make it less prominent), and we are just a small percentage left over. I've wondered how these particles actually came into existence. From what I understand of quantum physics, virtual particles come in and out of existence all the time, but it's different at the start of the universe, there is no zero point energy field present if there is literally nothing, so how could these matter and anti matter particles form from absolute nothing? Even if there was a ZPF present, how does this large of an influx of particles come? Why does the universe pretty much stop this process after the big bang? I was able to sleep at night answering the question with another question lol: How can the universe NOT come from nothing? Which is a rather, less pessimistic question, but it raises another point: What could stop a universe from coming from nothing? If there is nothing stopping it, it could happen right? Even if there is a 1/100^100^100^100^100^10000000000 chance of a universe happening, it would have to happen. I don't find god (what some theists decide to answer the question with lol), or even some multiverse theories as sufficient answers, they are not testable as far as I know so I don't see how it is even a relevant answer to the questions we have about reality. I think they are just designed to dodge having to answer some of the big question (more so the explanation "god did it"). I'm open minded to a 'multiverse' theory even though I don't think it would be very probable. I understand that we as humans try to find causality relationships within everything, but I'm perfectly fine with a 'causeless' beginning, I can wrap my head around it. What I do want to know is what in physics could allow these particles to come into existence? And how did this imbalance of matter and antimatter occur?