Thinking about the Universe somehow always gives me a had ake. It's just above our understanding. And what's a fourth dimension? You only have X,Y and Z. How would you want to have a fourth.
It's almost certain it happend. But it's weird though. I mean, the Big Bang was the begin. But how can their be nothing and then suddenly something... How can their be something without an origin...
*get's a head ake.*