The Fermi Paradox: Where Is Everybody?

The Fermi paradox, explained: our galaxy is old and packed with planets, so where is everybody? From a lunch at Los Alamos in 1950 to the Wow! signal, Tabby's Star and 'Oumuamua, plus every serious answer, from the Great Filter to the Zoo hypothesis. If even one species started spreading through the galaxy long ago, it should have reached us by now, and we see no one. In this video: how a joke over lunch became a real scientific puzzle, the simple math that makes the silence strange, the Drake equation, every signal we've actually sent and heard (Project Ozma, the Arecibo message, the Wow! signal), the odd objects that briefly looked like alien technology, and how little of the sky we've really searched. Then the leading answers (Rare Earth, the Great Filter, the Zoo hypothesis, the Dark Forest, "we're just early") and what the James Webb Space Telescope could tell us next. Chapters 0:00 Where is everybody? 0:38 The lunch where it started (Enrico Fermi, 1950) 1:19 The math: why we should have met someone by now 2:41 What we've sent and heard (Ozma, Arecibo, the Wow! signal) 3:49 Tabby's Star, 'Oumuamua and how little we've searched 5:08 The big answers: Great Filter, Rare Earth, Zoo, Dark Forest 6:23 How we'll find out Sources Jones, E. M. (1985), "Where is everybody?" An account of Fermi's question, Los Alamos report LA-10311-MS, https://www.osti.gov/biblio/5746675 Hart, M. H. (1975), "An explanation for the absence of extraterrestrials on Earth", QJRAS 16, 128 Project Ozma (1960) and the Drake equation (1961): https://seti.org/project-ozma The Arecibo message (16 Nov 1974): NAIC staff, Icarus 26, 462 (1975) Wow! signal: Ehman (1998), "The Big Ear Wow! Signal"; Méndez, Ortiz Ceballos & Zuluaga (2024), "Arecibo Wow! I", arXiv:2408.08513 (preprint, not peer reviewed) Boyajian et al. (2016), "Planet Hunters X", MNRAS 457, 3988, arXiv:1509.03622 (Tabby's Star); Meng et al. (2017), NASA/JPL, dust explanation 'Oumuamua: Micheli et al. (2018), Nature 559, 223; Bialy & Loeb (2018), arXiv:1810.11490; Bergner & Seligman (2023), Nature 615, 610 BLC1: Smith et al. and Sheikh et al. (2021), Nature Astronomy 5, 1148 and 1153 Wright, Kanodia & Lubar (2018), "How Much SETI Has Been Done?", AJ 156, 260 Sandberg, Drexler & Ord (2018), "Dissolving the Fermi Paradox", arXiv:1806.02404 Hanson (1998), "The Great Filter - Are We Almost Past It?"; Ball (1973), "The Zoo Hypothesis", Icarus 19, 347; Liu Cixin, The Dark Forest (2008); Loeb, Batista & Sloan (2016), arXiv:1606.08448 K2-18 b: Madhusudhan et al. (2025), arXiv:2504.12267; Luque et al. (2025), A&A 700, A284 NASA Habitable Worlds Observatory: https://science.nasa.gov/astrophysics... Credits Images (CC BY 4.0, https://creativecommons.org/licenses/... Milky Way panorama: ESO/S. Brunier. Hubble Ultra Deep Field: NASA, ESA, S. Beckwith (STScI) and the HUDF Team. 'Oumuamua deep image: ESO/K. Meech et al. M13: NASA, ESA, and the Hubble Heritage Team (STScI/AURA). Webb's First Deep Field: NASA, ESA, CSA, and STScI. Frank Drake and the Tatel telescope: NRAO/AUI/NSF. Arecibo aerial: H. Schweiker/WIYN and NOAO/AURA/NSF. Other Creative Commons: Pan-STARRS dome: Forest and Kim Starr (CC BY 3.0 US). Allen Telescope Array: Kathleen Franklin (CC BY 2.0). Public domain / US government: NASA, including Apollo 17 Blue Marble, Apollo 13 Moon, NASA/SDO Sun, NASA/JPL Voyager launch photos and Canberra DSS-43, and the Hubble Heritage NGC 1300. Arecibo photographs: National Science Foundation (Karen Pearce). Enrico Fermi badge portrait and Los Alamos Main Gate (1943): Los Alamos National Laboratory. Fuller Lodge: Historic American Buildings Survey, Library of Congress. Data: Boyajian et al. 2016, MNRAS 457, 3988 (Planet Hunters; NASA Kepler). Arecibo message: Frank Drake et al., NAIC, 1974. Wow! signal: Ohio State University Radio Observatory (Big Ear), Jerry R. Ehman. Music: "Musical Mathematics" by Lee Rosevere (https://freemusicarchive.org/music/le...) – licensed under CC BY 4.0 (https://creativecommons.org/licenses/...) Music: "Universe Calling" by Lee Rosevere (https://freemusicarchive.org/music/le...) – licensed under CC BY 4.0 (https://creativecommons.org/licenses/...) Music: "Wait" by Komiku (CC0) Sound effects: Kenney.nl and freesound.org (CC0), plus our own synthesis. Narration: synthetic voice. Research, script and animation made by a human-led team (and one hamster). Not affiliated with or endorsed by NASA, ESA, ESO, NSF, NRAO, DOE or Los Alamos National Laboratory. Tiny hamster. Huge questions. Subscribe if you like your science with a straight face: https://www.youtube.com/@ExistentialH... So where do you think everybody is? Tell us in the comments. #FermiParadox #Aliens #Space #SETI #Astronomy #GreatFilter #SpaceFacts #ScienceExplained