A trillion years ago, our universe didn’t exist, at least not in any recognizable form. According to the Big Bang theory, ...

The Many-Worlds Interpretation Proposed by physicist Hugh Everett in 1957, the Many-Worlds Interpretation (MWI) of quantum ...

Another perspective on the multiverse is the brane universe, which describes our universe as one membrane in a vast, possibly infinite stack of membrane universes, but with no connection or means ...

Regardless, our universe would then adopt the shape of this brane as seen from within the bulk. There could be other branes in the bulk too, each with their own independent universes.

Gravity and stable orbits are not the only requirements for life – or, more important when you are using anthropic reasoning to explain why we are in a 3D universe, for observers to exist.