The Fermi paradox, named after Italian-American physicist Enrico Fermi, is the apparent contradiction between the lack of evidence for extraterrestrial civilizations elsewhere in the Milky Way galaxy and high estimates of their probability, such as those that result from optimistic choices of parameters in the Drake equation.

Related channels: EXTRATERRESTRIAL LIFE, ASTROBIOLOGY, SETI INSTITUTE, MARS, EUROPA (JUPITER MOON), ENCELADUS (SATURN MOON), CURIOSITY (NASA ROVER), EUROPA CLIPPER (NASA SPACECRAFT), UNIDENTIFIED FLYING OBJECTS, EXOPLANETS