Physicist and writer Paul Halpern is the author of more than a dozen popular science books, exploring the subjects of space, time, extrasolar planets, higher dimensions and cosmology. His most recent book is Edge of the Universe: A Voyage to the Cosmic Horizon and Beyond
The nature of time is one of the deepest mysteries. In a new paper, submitted to an essay contest for the Foundational Questions Institute, I offer my own thoughts on this riddle: