Some philosophers have attempted to solve the problem of free will by connecting it to the possibility of an infinite number of worlds. Others have tried to explain the "mystery" of free will in terms of other mysteries, especially quantum puzzles and paradoxes. Mathematical infinities have the extraordinary capability of including all possible possibilities. This idea can be been extended to the natural world, since the universe is now believed to be physically infinite in space, if not in time. It appears there was a moment of creation about 13.8 billion years before which the laws of physics as we know them have no explanatory power. Some say that means the universe is not infinite in the direction of past time. Some popular infinities recruited by philosophers and scientists include
Out of an infinity of Keith Wintons in an infinity of universes plus an infinity of universes in which there wasn't any Keith Winton plus at least one universe — rather, plus an infinity of universes again — in which Keith Winton had been but was missing after a rocket flash. But this universe was a real one now. For a while, at least.... This, he thought, was a universe he'd really settle for.