Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Paul Halpern is an American Professor of Physics, and Fellow in the Humanities at the University of the Sciences in Philadelphia. He received a Ph.D in theoretical physics, a M.A. in physics and a B.A. in physics and mathematics. He was also the recipient of a Guggenheim Fellowship, Fulbright Scholarship, and an Athenaeum Society Literary Award.He has written many widely acclaimed popular science books and articles, books including The Cyclical Serpent, Cosmic Wormholes and The Great Beyond. He also appeared on "Future Quest," a PBS series, as well as the National Public Radio show "Radio Times."

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