Even though certain features of the universe seem to require the existence of a multiverse, nothing has been directly observed that suggests it actually exists.

How many Multiverses are there?

In a new study, Stanford physicists Andrei Linde and Vitaly Vanchurin have calculated the number of all possible universes, coming up with an answer of 10^10^16.

Can we travel to the multiverse?

If you are an advocate of a multiple big bang multiverse, then that would mean that leaving our universe to travel to another would be just as impossible as travelling back to the time before the big bang that resulted in our universe even happened.