[viscapes]

I think the existence of a multi-verse is almost certain. Here's why.

The probability of the conditions for life existing on planet earth are so small that we shouldn't exist. That is, unless there are billions of planets in the universe providing billions of opportunities for those conditions to exist. There are, and we exist as a result.

Equally, the conditions required for our universe to exist are so astronomically small that our universe shouldn't exist. That is, unless there are billions of universes providing billions of opportunities for the conditions of our universe to exist. We exist, therefore there must be billions of universes (a multi-verse).

The only possible alternative is that there is a supernatural intelligence behind it all that created the conditions for our universe from nothing. But that begs all sorts of other questions. The multi-verse theory seems far more likely to me.