Fermi paradox
apparent contradiction between the lack of evidence and high probability estimates for the existence of extraterrestrial civilizations
en-GB/ˈfɜːmɪ ˈpæɹədɒks/
en-US/ˈfɝmi ˈpæɹəˌdɑks/
apparent contradiction between the lack of evidence and high probability estimates for the existence of extraterrestrial civilizations