Well, it's stupid really; it's a debate in R.E. lessons and people make a joke of always turning to me for a scientific explanation. I'm only fifteen, and I'm not even that smart. Anyway, since the cause of the Big Bang is still debated, and also because my best friend and I always take opposing sides as part of a friendly bit of competiton, I came out with quantum fluctuation as an answer, which I read in New Scientist ages ago.
Not that you'd be particularly interested, but we've been split into sub-groups with a designated leader and an autonomously-chosen topic. And now I'm expected to say something about quantum fluctuation- something that I don't really understand.
All that I need is a simple explanation of the process- that's if cutting-edge science really can be distilled into something that even fiteen-year-olds can understand. Once again, thanks for all of your replies!