ponjee, why do you think that they had to be created?
Before you give the religionist's stock answer ..that nothing comes from nothing, therefore there must have been a creator...be careful, 'cos you'll end up in the mire, as I have explained many times before.
You see, if nothing comes from nothing then the creator must have been created, and the creator of the creator must have been created... and so on. So you end up believing, not in one creator but an infinite succession of them.
So why do you think the universe had to be created?