“We are actually living in a million parallel realities every single minute.” -Marina Abramovic
Ever since quantum mechanics first came along, we’ve recognized how tenuous our perception of reality is, and how — in many ways — what we perceive is just a very small subset of what’s going on at the quantum level in our Universe. Then, along came cosmic inflation, teaching us that our observable Universe is just a tiny, tiny fraction of the matter-and-radiation filled space out there.
There are very real possibilities of other Universes, including ones with different fundamental laws and constants, differing quantum outcomes existing in disconnected regions of space, and even the fantastic one of parallel Universes and alternate versions of you and me. It’s a fascinating possibility, but what does physics have to say about whether it reflects our reality?