“When you think of a parallel universe, do you think of a universe, or a world, similar to ours but different in some fundamental quality? Bill Clinton, for instance, is a happily celibate priest. Or George W. Bush delights his fellow Mensa members, at parties, with his verbal games. Or, perhaps, you only have a science-fiction quality vagueness to what you think of a parallel universe: pointed ears, warp-drive through worm holes, and form fitting Lycra body suits on a thin, well-groomed crew. A parallel universe, it may surprise you to learn, is actually detectable in your own home, office, or almost anywhere indoors. All that’s required is a red laser pointer, a pin, and a piece of paper.

With the aid of David Deutsch, a physicist at Oxford University and his excellent book The Fabric of Reality, the experiment, in a step-by-step process, is going to be set-up and, then, it’s going to be explained why this magic-like result from this experiment is indeed proof of a parallel universe.” — allsci