Paul Halpern is Professor of Physics at the University of the Sciences in Philadelphia and the author of many trade science books, including The Cyclical Serpent, Countdown to the Apocalypse, and The Pursuit of Destiny. He lives in Philadelphia.

Paul Halpern is Professor of Physics at the University of the Sciences in Philadelphia and the author of many trade science books, including The Cyclical Serpent, Countdown to the Apocalypse, and The Pursuit of Destiny. He lives in Philadelphia.

Paul Halpern is Professor of Physics at the University of the Sciences in Philadelphia and the author of many trade science books, including The Cyclical Serpent, Countdown to the Apocalypse, and The Pursuit of Destiny. He lives in Philadelphia.