Science Forums 2

[Tormod]

This is indeed one of the things that Martin Rees discusses in the book I mention above, "Our Cosmic Habitat". Although he calls it a Multiverse, it is basically the same thing: an infinity of universes in which ours is finely tuned for life while many others are not.

The idea may sound radical, but the problem is that it is extremely difficult to prove. Because we are unable to probe anything beyond the de Sitter horizon - simply because light, or anything else which moves at the speed of light will never escape from any other universe and enter our own. Thus we cannot see anything which does not come from our own Universe. So we (might) never be able to observe anything directly.

So it begs the question, how can this be proved? Martin Rees says that since it can be contemplated then it is indeed science - I am not sure this is sufficient for me.

But I agree that the theory is intriguing.