Legendary astrophysicist NEIL DEGRASSE TYSON is the host of the popular podcast StarTalk Radio and Emmy award-winning National Geographic Channel shows StarTalk and Cosmos. He earned his BA in physics from Harvard and his Ph.D. in astrophysics from Columbia. The author of more than a dozen books, including the best-selling Astrophysics for People in a Hurry, Tyson is the first Frederick P. Rose Director of the Hayden Planetarium. He lives in New York City with his wife and two children. Facebook: Neil deGrasse Tyson. Instagram: @neildegrassetyson. Twitter: @neiltyson.
JAMES TREFIL, Clarence J. Robinson Professor of Physics at George Mason University, is internationally recognized not only as a distinguished scientist but also as an expert in making complex scientific ideas understandable. He is the author of numerous magazine articles and books on science for the general public, including both editions of National Geographic's highly successful Space Atlas. He lives in Fairfax, Virginia, with his wife.

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Neil deGrasse Tyson tackles the world's most important philosophical questions about the universe with wit, wisdom, and cutting-edge science. 