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Drake, Frank & Carl Sagan (1997) The search for extraterrestrial intelligence, Scientific American, January 6.
Shostak, Seth (2021) Extraterrestrial intelligence, Encyclopedia Britannica, December 1.
Fermi paradox | nonhumans and the long-term future | space colonization | space governance
Extraterrestrial intelligence is hypothetical intelligent life that did not originatingoriginate on Earth.
Extraterrestrial intelligence is hypothetical intelligent life not originating on Earth.
Fermi paradox | grabby aliens | Great Filter | nonhumans and the long-term future | space colonization | space governance