Definition
The Fermi paradox is the discrepancy between the lack of conclusive evidence of advanced extraterrestrial life and the apparently high likelihood of its existence.
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KnightChicago Pile-1Chicxulub craterCircumstellar habitable zoneCivilizationClimate changeCombustionCommunication with extraterrestrial intelligenceCommunications satelliteConsumption (economics)ContrapositionConvergent evolutionConversations on the Plurality of WorldsCopernicus PublicationsCosmicOSCosmic CallCosmic pluralismCuriosity (rover)Dark forest hypothesisDarwin (spacecraft)David BrinDavid KippingDavid ViewingDe factoDefense Meteorological Satellite ProgramDefinition of lifeDelta-vDemandDennis OverbyeDialectical materialismDirected panspermiaDirk Schulze-MakuchDonald BrownleeDragonfly (Titan space probe)Drake equationDynamical systems theoryDyson sphereEPIC 204278916EXPOSEEarliest known life formsEarthEarth analogEaster IslandEconomicsEcosystemEdward Robert HarrisonEdward TellerElectricity generationEmil KonopinskiEmission linesEnceladusEnceladus ExplorerEnceladus Life FinderEnceladus Life Signatures and HabitabilityEnceladus OrbilanderEnrico FermiEntropyEric DrexlerEt alEuCROPISEukaryoteEukaryotesEuropa (moon)Europa ClipperEuropa Lander (NASA)European Astrobiology Network AssociationEvidenceEvolutionEvolution of biological complexityEvolutionary biologyEx anteExistential risk from artificial general intelligenceExoLanceExoMarsExobiology Radiation AssemblyExoplanetExoplanetologyExotheologyExplorer of Enceladus and TitanExposing Microorganisms in the StratosphereExtinction eventExtraterrestrial UFO hypothesisExtraterrestrial hypothesisExtraterrestrial intelligenceExtraterrestrial lifeExtraterrestrial liquid waterExtraterrestrial sample curationExtraterrestrials in fictionExtremophileFast radio burstFaster-than-lightFeedbackFermi problemFiber-optic cableFireFirstborn hypothesisFlying saucersFobos-GruntFoton-MFounder effectFrancis CrickFrank DrakeFrank J. 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LandisGeological timeGeomicrobiologyGlaciationGlobal catastrophic riskGlobal governanceGlobal warmingGreat FilterGreg BearGregory BenfordHD 164595Habitability of F-type main-sequence star systemsHabitability of G-type main-sequence star systemsHabitability of K-type main-sequence star systemsHabitability of binary star systemsHabitability of natural satellitesHabitability of neutron star systemsHabitability of red dwarf systemsHabitable zoneHabitable zone for complex lifeHabitat (ecology)Hans FreudenthalHart–Tipler conjectureHayabusa2Hello from EarthHemolithinHerbert YorkHertzsprung–Russell diagramHistory of radioHistory of the extraterrestrial life debateHomo sapiensHouse of LordsHuman genomeHuman intelligenceHypothetical types of biochemistryIan Crawford (astrobiologist)Ice planetIcebreaker LifeIndustrial RevolutionInfraredInsider IncIntelligenceIntergalactic travelInterplanetary contaminationInterstellar communicationInterstellar travelIosif ShklovskyJevons paradoxJohn D. BarrowJon LombergJournal of the British Interplanetary SocietyJourney to Enceladus and TitanJules VerneJupiter Icy Moons ExplorerK-T extinctionK-type main-sequence starKIC 8462852Kardashev scaleKazachokKepler space telescopeKnowledge economyKnowledge managementKonstantin TsiolkovskyL4 (spacecraft)Laplace-PLe MoustierLeo SzilardLife Investigation For EnceladusLife on MarsLife on TitanLife on VenusLifespan of the universeLight-yearLincos languageLinda Salzman SaganList of alleged extraterrestrial beingsList of interstellar radio messagesList of microorganisms tested in outer spaceList of potentially habitable exoplanetsLithosphereLittle green menLiu CixinLiving Interplanetary Flight ExperimentLong Duration Exposure FacilityLos Alamos National LaboratoryLos Alamos Ranch SchoolLos Angeles TimesM-type main-sequence starMELOSMagnetosphereMain sequenceMain sequence starsManhattan ProjectMars 2020Mars Astrobiology Explorer-CacherMars Geyser HopperMars Science LaboratoryMars sample-return missionMars sample return missionMediocrity principleMeiosisMetaverseMeteoroidMethods of detecting extrasolar planetsMichael Garrett (astronomer)Michael H. 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