Paul Halpern is a professor of physics at the University of the Sciences in Philadelphia, and the author of sixteen popular science books, including The Quantum Labyrinth. He is also a Fellow of the American Physical Society. He lives near Philadelphia, Pennsylvania.
The long history of one of physics' most enticing ideas: that the universe we know isn't the only one
Our books, our movies-our imaginations-are obsessed with extra dimensions, alternate timelines, and the sense that all we see might not be all there is.... SEE MORE