Universes

Universes refer to all of space and everything within it—planets, stars, galaxies, and the fundamental forces that govern them. The most well-known is our universe, which began with the Big Bang about 13.8 billion years ago and has been expanding ever since. Some theories suggest the existence of multiple universes, or a "multiverse," where different universes might have different physical laws. Essentially, a universe is the totality of everything that exists physically, encompassing all dimensions of space and time, and is the largest scale of reality we understand through scientific inquiry.