<snip> Anyway, parallel dimensions/universes are a pretty freaky subject and it probably isn't a good idea to dwell on it too long... If you haven't already, go and watch the Butterfly Effect! Personally it doesn't seem all that plausible to me... I'm all for multiple universes (possibly an infinite number beyond our own) but to me they must exist in their own right and the thought of them being 'aware' of us and our actions seems a bit, well sci-fi. However, having said that there are already many things in our own universe that make effectively no sense whatsoever to our human minds- quantum theory being one of them. Also, I only found out the other day in Bill Bryson that electrons don't actually orbit a nucleus in nice discreet circles like the school books tell but but are in fact everywhere in the electron cloud at once, and at the same time nowhere. Or something like that. Now there's a mindf*#k!