A Man that is of Copernicus’s Opinion, that this Earth of ours is a Planet, carry’d round and enlighten’d by the Sun, like the rest of the Planets, cannot but sometimes think, that it’s not improbable that the rest of the Planets have their Dress and Furniture, and perhaps their Inhabitants too as well as this Earth of ours.
Christiaan Huygens (1629-1695) Dutch physicist, mathematician, astronomer, inventor
Cosmotheoros, Book 1 (1695; publ. 1698) [tr. Clarke (1722)]
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Quotations about:
extraterrestrial
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The biggest breakthrough in the next 50 years will be the discovery of extraterrestrial life. We have been searching for it for 50 years and found nothing. That proves life is rarer than we hoped, but does not prove that the universe is lifeless.
Freeman Dyson (1923-2020) English-American theoretical physicist, mathematician, futurist
“Freeman Dyson forecasts the future,” New Scientist (15 Nov 2006)
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We have already discovered two species that are very intelligent but technically less advanced than us — the common chimpanzee and pygmy chimpanzee. Has our response been to sit down and try to communicate with them? Of course not. Instead we shoot them, stuff them, dissect them, cut off their hands for trophies, put them on exhibit in cages, inject them with AIDS virus as a medical experiment, and destroy or take over their habitat.
That response was predictable, because human explorers who discovered technically less advanced humans also regularly responded by shooting them, decimating their populations with new diseases, and destroying or taking over their habitat. Any advanced extraterrestrials who discovered us would surely treat us in the same way. […]
Think again of those astronomers who beamed radio signals into space from Arecibo, describing Earth’s location and its inhabitants. In its suicidal folly that act rivalled the folly of the last Inca emperor, Atahualpa, who described to his gold-crazy Spanish captors thewealth of his capital and provided them with guides for the journey. If there really are any radio civilizations within listening distance of us, then for heaven’s sake let’s turn off our own transmitters and try to escape detection, or we are doomed.
Jared Diamond (b. 1937) American geographer, historian, ornithologist, author
The Third Chimpanzee, ch. 12 (1992)
Perhaps the safest thing to do at the outset, if technology permits, is to send music. This language may be the best we have for explaining what we are like to others in space, with least ambiguity. I would vote for Bach, all of Bach, streamed out into space, over and over again. We would be bragging of course, but surely it is excusable for us to put the best possible face on at the beginning of such an acquaintance. We can tell the harder truths later.
Lewis Thomas (1913-1993) American physician, poet, essayist, researcher
“Ceti,” New England Journal of Medicine (10 Feb 1972)
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On sending messages to extraterrestrial civilizations on other worlds, e.g. Tau Ceti. Citation N Engl J Med 1972; 286:306-307. Reprinted in The Lives of a Cell: Notes of a Biology Watcher (1974).
