All About Nothing

New Scientist offers a brief explanation of how the universe could have popped into existence out of "nothing." Actually, what it is is a mathematical account of how such a counter-intuitive event might be explained. It's pretty interesting:

An accompanying article by Paul Davies gives much more detail. Here's an excerpt:

So the modern conception of the vacuum [i.e. "empty space"]is one of a seething ferment of quantum-field activity, with waves surging randomly this way and that. In quantum mechanics, waves also have characteristics of particles, so the quantum vacuum is often depicted as a sea of short-lived particles - photons for the electromagnetic field, gravitons for the gravitational field, and so on - popping out of nowhere and then disappearing again.

Wave or particle, what one gets is a picture of the vacuum that is reminiscent, in some respects, of the ether. It does not provide a special frame of rest against which bodies may be said to move, but it does fill all of space and have measurable physical properties such as energy density and pressure.

Evidently, according to scientists who study these things, there is no such thing as nothing. Empty space is not completely empty. Very well, but I'm not sure how this explains the origin of the universe since before there was a universe there was no space and thus no vacuum out of which it could have arisen.

I suppose one might respond that our universe is actually only one of a multitude of universes embedded in a pre-existing space, like bubbles floating in the air, out of which our world arose. This, though, sounds more like metaphysical speculation than empirical science.

In any event, the universe is a very, very strange place.