Updated on August 8, 2022 Carl Edward Sagan (November 9, 1934 – December 20, 1996) was an American planetary scientist, astronomer, and cosmologist whose best-known scientific contribution to the field is his research on extraterrestrial life. He was the one to assemble the Pioneer plaque and the Voyager Golden Record, the first physical messages sent into space that could … [Read more...] about Carl Sagan Timeline
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