Big Bang & Multiverses (Introduction)

by dhw, Tuesday, February 01, 2011, 12:25 (5023 days ago) @ David Turell

David has drawn our attention to an interview between Brian Greene, a string theorist, and David Gelernter, in which Greene suggests that there are many other universes, and many other identical Greenes and Gelernters, who have led identical lives.-Later he says: "We live in a universe in which the amount of dark energy fits our biological make-up. If the amount of dark energy were substantially different from what we've measured, the environmental conditions would be inhospitable to our form of life. So, while the multiverse contains universes with many different amounts of dark energy, we couldn't survive in most, explaining why we're in this universe and not another."-So Greene and Gelernter are in other universes, but they are in this universe and NOT in another. I don't think I shall ever understand physics. I alluded recently to Bertrand Russell's celestial teapot, which orbits the sun and is too small to be detected by any instruments. Funnily enough, Russell used the teapot story (Dawkins calls it a "parable") to ridicule the argument for God because, after all, neither theory can actually be disproved. Well, who's going to disprove the theory that we have identical doubles living identical lives on identical planets in other universes, although we're in this universe and not another? Talk about pots and kettles...