The Origins of the Universe.

The astrophysicist says that participating in a "great unfolding of a cosmic story" should make us feel large, not small. This spring, Tyson hosts a TV series called Cosmos: A Space-Time Odyssey.

With his book, The Elegant Universe, physicist Brian Greene developed a reputation for explaining complex scientific theories with insight and clarity. The book was the basis for a PBS series. His new book is The Fabric of the Cosmos: Space, Time, and the Texture of Reality. Greene is a professor of physics and mathematics at Columbia University. He received his undergraduate degree from Harvard and his doctorate from Oxford, where he was a Rhodes scholar.

Brazilian physicist Marcelo Gleiser is the author of the new book, The Prophet and the Astronomer: A Scientific Journey to the End of Time (WW Norton). In it he explores our relationship to the sky and how it has influenced religion and then in turn - science. He writes, 'one of my goals. . is to humanize science, to argue that our scientific ideas are very much a product of the cultural and emotional environment where they originate'. Gleiser is Professor of Natural Philosophy and professor of physics and astronomy at Dartmouth College.