Cosmic carbonation.

After reading Tom Siegfried's wonderful article ("Infinity," SN: 6/6/09, p. 26) on multiple universes and inflation theory, I was watching the carbonated bubbles appear in my beverage and wondered if the "entities" living in the film of those bubbles would have any understanding of the carbonation causing their universe to expand until it bursts or merges with another universe. Is our universe nothing more than a bubble in some cosmic beer mug?

Larry D. Rex, Santa Clara, Calif.