Recently there was a question that said, "you can't create something from nothing, can you?"
Actually, if I understand quantum theory correctly, something indeed can exist from nothing.
- nothing can spontaneously decay into a particle and its anti-particle
- usually, those two particles then interact with each other, leaving nothing again afterward
- occasionally one of those two resulting particles will interact with something else instead
- consequently, the remaining particle of the original two particles will then continue to exist.
Voila! something out of nothing, and it is grounded in physics.