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Called the “Carl Sagan of the 21st century,” astrophysicist Dr. Neil deGrasse Tyson is a big brain with an even bigger personality who will take us on an enthusiastic journey out of this world. Dr. Tyson is the director of the Hayden Planetarium at the American Museum of Natural History, host of PBS’s NOVA ScienceNow series, author of Death by Black Hole and The Pluto Files, and explainer of all things cosmic.