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 Previewing: The books and ideas of Carl Sagan 
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Discussion of key ideas from some of Carl Sagan's fiction and non-fiction books. Are we alone in the universe? What would constitute scientific evidence for a Creator? How can we make use of science for human advancement?
The books and ideas of Carl Sagan owned by: jwschmidt
A member of Astronomers Past and Present since 07/31/2005.