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Pluto (Dwarf planet)
Feb 1, 2012 — Novelist David Levithan takes a wry look at adultery, while food writer Jessica Harris takes an African journey, astronomer Mike Brown explains the demotion of planet Pluto, novelist Stephen Amidon probes the human heart with his cardiologist brother, Thomas, and veterinarian Nicholas Dodman offers help for aging dogs.
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Feb 13, 2009 — The director of the American Museum of Natural History's Hayden Planetarium and author of The Pluto Files, Neil deGrasse Tyson, talks about the future of NASA, Pluto's demotion to dwarf-planet status, and the difference between Darwin and Einstein.


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