Carl Sagan

Hank pays tribute to Carl Sagan, noting his accomplishment as an astronomer and his contributions to culture -- both pop and otherwise -- as one of the great popularizers of science. Happy Carl Sagan Day!

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Sources:
http://www.networkworld.com/columnists/2012/092412-buzz-262652.html
http://blogs.discovermagazine.com/badastronomy/2012/11/09/repost-carl-sagan-day/#.UgzXXhafoUU
http://www.carlsagan.com
http://www.nytimes.com/learning/general/onthisday/bday/1109.html
http://www.americanscientist.org/bookshelf/pub/carl-sagan-carl-sagan-biographies-echo-an-extraordinary-life