ASTROPHYSICS
What exists outside our observable cosmos?
There are some questions that science just can’t answer. This is one of them. Humanity, in our three-dimensional reality, is confined to this universe. We can’t experience what is beyond through any means known to science. Imagine life on the surface of a vast balloon. If all you know is the balloon’s surface, you can identify no centre on that surface. You can’t see what is inside that surface or external to that surface. While observational science doesn’t allow us to get to an answer from here, theorists have put forward a variety of ideas.