Constants of an inconstant nature

Physicists John D. Barrow and John K. Webb say "In the grand scheme of things, our observable universe is thought to be a small part of a multiverse. Other regions could have values of the fine-structure constant different from ours. In principle, astronauts could venture into those realms, but they would encounter a surreal scene, where the laws of physics that enable their existence were pulled out from under their feet."


From an article in "A Matter of Time", a special edition from Scientific American