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'''Carl Edward Sagan''' ([[November 9]] [[1934]] – [[December 20]] [[1996]]) was an [[United States|American]] [[astronomer]], [[Astrobiology|astrobiologist]], and highly successful science popularizer. He pioneered [[Astrobiology|exobiology]] and promoted the Search for Extra-Terrestrial Intelligence ([[SETI]]). He is world-famous for writing [[popular science]] books and for co-writing and presenting the award-winning 1980 television series ''[[Cosmos: A Personal Voyage]]'', then the most-watched [[Public Broadcasting Service|PBS]] program of all time<ref> According to [http://starchild.gsfc.nasa.gov/docs/StarChild/whos_who_level2/sagan.html nasa.gov], [http://www.infoplease.com/ipa/A0187957.html], [http://www.seasky.org/spacexp/sky5e08.html] and [http://www.mnsu.edu/emuseum/information/biography/pqrst/sagan_carl.html]</ref> until 1990's [[The Civil War (documentary)|''The Civil War'']]. A [[Cosmos (book)|book]] to accompany the program was also published. He also wrote the novel [[Contact (novel)|''Contact'']], the basis for the 1997 [[Contact (film)|film of the same name]] starring [[Jodie Foster]]. During his lifetime, Sagan published more than 600 scientific papers and popular articles and was author, co-author, or editor of more than 20 books. In his works, he frequently advocated [[scientific skepticism]], [[humanism]], and the [[scientific method]].

'''Carl Edward Sagan''' ([[November/9|November 9]], [[1934]] – [[December/20|December 20]], [[1996]]) was an [[United States|American]] [[astronomer]], [[Astrobiology|astrobiologist]], and highly successful science popularizer. He pioneered [[Astrobiology|exobiology]] and promoted the Search for Extra-Terrestrial Intelligence ([[SETI]]). He is world-famous for writing [[popular science]] books and for co-writing and presenting the award-winning 1980 television series ''[[Cosmos: A Personal Voyage]]'', then the most-watched [[Public Broadcasting Service|PBS]] program of all time<ref> According to [http://starchild.gsfc.nasa.gov/docs/StarChild/whos_who_level2/sagan.html nasa.gov], [http://www.infoplease.com/ipa/A0187957.html], [http://www.seasky.org/spacexp/sky5e08.html] and [http://www.mnsu.edu/emuseum/information/biography/pqrst/sagan_carl.html]</ref> until 1990's [[The Civil War (documentary)|''The Civil War'']]. A [[Cosmos (book)|book]] to accompany the program was also published. He also wrote the novel [[Contact (novel)|''Contact'']], the basis for the 1997 [[Contact (film)|film of the same name]] starring [[Jodie Foster]]. During his lifetime, Sagan published more than 600 scientific papers and popular articles and was author, co-author, or editor of more than 20 books. In his works, he frequently advocated [[scientific skepticism]], [[humanism]], and the [[scientific method]].

==Education and scientific career==

==Education and scientific career==