Carl Sagan - Wikiwand

Carl Edward Sagan was an American astronomer and science communicator. His best known scientific contribution is his research on the possibility of extraterrestrial life, including experimental demonstration of the production of amino acids from basic chemicals by radiation. He assembled the first physical messages sent into space, the Pioneer plaque and the Voyager Golden Record, which were universal messages that could potentially be understood by any extraterrestrial intelligence that might find them. He argued in favor of the hypothesis, which has since been accepted, that the high surface temperatures of Venus are the result of the greenhouse effect.

Uncategorized Archives - Endless Forms Most Wonderful: Reflections in Natural History

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SETI Institute - Wikiwand

Carl Sagan - Wikipedia

Carl Sagan - Wikiwand

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Carl Sagan - Wikiwand

How did ancient civilisations know what constellations were without telescopes? - Quora

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The Origin of Language: Starts in Symbolism Around 100,000 years ago, to Early Proto-Writing 44,000-5,000 years ago with Unrealized Connections

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