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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