Hi, I'm a new user here just trying to learn a bit more about quantum. I just read a website about feynman's sum-over-histories method that claims that experiments have proven that Feynman was correct. I know enough about science to understand that everything is pretty much just a theory. And the reason we think theories are true is because we haven't seen any evidence to believe otherwise. Because of this, I know that Feynman's sum-over-histories cannot possibly be PROVEN to be correct, but I am curious about how much evidence is out there that Feynman was right. Is it pretty much accepted in the physics community that the particle does in fact travel in every possible path? And if so, are the effects of its electric field in fact all over the universe at the same time?