Remembering Carl Sagan on His Birthday: Innovator, Visionary, and Humanitarian Remembering Carl Sagan on His Birthday: Innovator, Visionary, and Humanitarian
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Remembering Carl Sagan on His Birthday: Innovator, Visionary, and Humanitarian

by Yasha Wallin

November 12, 2012


He established groundbreaking insights regarding the atmospheres of Venus and Jupiter and seasonal changes on Mars. He also spoke widely about the phenomena of global warming as a growing, man-made danger. He equated it to the natural expansion of Venus into a hot, life-hostile planet through a kind of runaway greenhouse effect.

Sagan's work around searching for extraterrestrial life spawned the popular PBS series Cosmos: A Personal Voyage, that he penned as well as the book Contact, which was made into a film after Sagan's death starring Jodi Foster. Sagan was also considered somewhat of a radical in his field, protesting the Vietnam war and later the nuclear arms race, in particular Ronald Reagan's Star Wars program.

Photos via Wikimedia Commons

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Remembering Carl Sagan on His Birthday: Innovator, Visionary, and Humanitarian