Summary
Recent research from the Cool Worlds Lab addresses two longstanding mysteries regarding the existence of intelligent life in the universe. The study reveals that M-dwarf stars, which comprise about 82% of all stars, have significantly longer lifespans than G-type stars, like our Sun. This raises the question of why life seems to emerge early in the universe's history, despite the abundance of potentially habitable M-dwarf stars. The findings suggest that the conditions around these stars may not support the development of intelligent observers.
The research proposes several hypotheses to explain these puzzles. One possibility is that low-mass stars do not develop observers due to inhospitable conditions, termed the "desolate M-dwarf hypothesis." Another theory suggests that planetary biospheres have finite lifetimes, limiting the time available for life to evolve. The analysis employs Bayesian statistics to evaluate these hypotheses, ultimately indicating that the desolate M-dwarf scenario provides the most compelling explanation for our existence.
The implications of this research are profound, suggesting that two-thirds of stars in the universe may not be capable of supporting intelligent life. This challenges previous assumptions about the potential for life around M-dwarfs and aligns with recent observations from the James Webb Space Telescope, which have found barren conditions on planets orbiting such stars. The study emphasizes the need for further exploration and understanding of these cosmic phenomena, as it could reshape our perspective on life beyond Earth.
Show Notes
Use code coolworlds at https://incogni.com/coolworlds to get an exclusive 60% off an annual Incogni plan.New research from the Cool Worlds Lab leads a shocking conclusion - most stars might be incapable of developing intelligent life....Written & presented by Prof. David Kipping, edited by Jorge Casas. Thumbnail by Pablo Carlos Budassi https://pablocarlosbudassi.com→ Support our research: https://www.coolworldslab.com/support→ Get merch: https://crowdmade.com/collections/cool-worlds→ Check out our podcast: www.youtube.com/@CoolWorldsPodcastPAPER: https://arxiv.org/abs/2510.01215THANK-YOU to D. Smith, C. Bottaccini, D. Daughaday, S. Brownlee, E. West, T. Zajonc, A. De Vaal, M. Elliott, B. Daniluk, S. Vystoropskyi, S. Lee, Z. Danielson, C. Fitzgerald, C. Souter, M. Gillette, J. Rockett, M. Sanford, T. Donkin, A. Schoen, K. Dabrowski, J. Armstrong, B. Smith, J. Bergman, C. Macdonald, M. Hedlund, N. Corwin, K. Howard, G. Metts, R. Provost, G. Fullwood, N. De Haan, R. Williams, E. Garland, R. Lovely, D. Compos, F. Demopoulos, T. Edris, M. O'Brien, D. Lee, M. Czirr, I. Williams, B. Reese, A. Nimmerjahn, C. Seay, D. Johnson, L. Cunningham, M. Morrow, M. Campbell, B. Devermont, P. Borisoff, H. Schiff, J. Cos, C. Hansen, R. Chaffee, A. Ortiz, B. McMillan, B. Cartmell, J. Bryant, J. Obioma, M. Zeiler, S. Murray, S. Patterson, C. Kennedy, G. Le Saint, W. Ruf, A. Kochkov, B. Langley, P. Stevenson, T. Ford, A. Laroye, I. Venzor, R. Raszka, B. Gaalen, J. Alley, D. Aron, G. Thomsen, S. Shardool, A. Phan Le, N. Offor, A. Huch, J. Morrison, C. Fitzsimmons, W. Smith, A. Twyman, B. Burgess, B. Bueche, D. Hoffman, J. Murphy, J. Matters, R. Borbidge, A. Singh, S. Larter & M. Adler.MUSICLicensed by SoundStripe.com (SS) [shorturl.at/ptBHI], Artlist.io, via CC Attribution License (https://creativecommons.org/licenses/by/4.0/) or with permission from the artist.0:00 Ending: Agrippa - Mikko Tarmia2:41 Atlas - Waking Up3:20 Hill - World of Wonder5:11 Atlas - Waking Up7:35 Hill - Fragile Beings10:46 Hill - A Flickering Start13:50 Hill - A Thin Place18:51 Hill - Kingdom of the SkiesCHAPTERS0:00 Two Existential Puzzles3:20 Incogni5:11 Possible Explanations7:05 Bayesian Modeling9:50 Results12:05 No Luck13:52 Interpretation15:17 Lies & Statistics18:11 Final Thoughts20:09 Outro + Credits#CoolWorlds #AlienLife #Sun Learn more about your ad choices. Visit megaphone.fm/adchoices
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Click https://betterhelp.com/coolworlds for 10% off your first month of therapy with our sponsor BetterHelp. Join over 4 million people who’ve met with a therapist on BetterHelp and started living a healthier, happier life.We usually celebrate the big wins, the major discoveries, the eureka moments... but sometimes the most important moments in science aren't like this. Today we explore a pivotal moment that may have saved the field of exoplanets from a much darker path...Written & presented by Prof. David Kipping. Thanks to Matt Bailes for graciously coming on.→ Support our research: https://www.coolworldslab.com/support→ Get merch: https://teespring.com/stores/cool-worlds-store→ Check out our podcast: www.youtube.com/@CoolWorldsPodcastTHANK-YOU to D. Smith, M. Sloan, L. Sanborn, C. Bottaccini, D. Daughaday, A. Jones, S. Brownlee, N. Kildal, Z. Star, E. West, T. Zajonc, C. Wolfred, L. Skov, G. Benson, A. De Vaal, M. Elliott, B. Daniluk, S. Vystoropskyi, S. Lee, Z. Danielson, C. Fitzgerald, C. Souter, M. Gillette, T. Jeffcoat, J. Rockett, D. Murphree, T. Donkin, K. Myers, A. Schoen, K. Dabrowski, J. Black, R. Ramezankhani, J. Armstrong, K. Weber, S. Marks, L. Robinson, S. Roulier, B. Smith, J. Cassese, J. Kruger, S. Way, P. Finch, S. Applegate, L. Watson, E. Zahnle, N. Gebben, J. Bergman, E. Dessoi, C. Macdonald, M. Hedlund, P. Kaup, C. Hays, W. Evans, D. Bansal, J. Curtin, J. Sturm, RAND Corp., M. Donovan, N. Corwin, M. Mangione, K. Howard, L. Deacon, G. Metts, R. Provost, B. Sigurjonsson, G. Fullwood, B. Walford, J. Boyd, N. De Haan, J. Gillmer, R. Williams, E. Garland, A. Leishman, A. Phan Le, R. Lovely, M. Spoto, A. Steele, K. Yarbrough, A. Cornejo, D. Compos, F. Demopoulos, G. Bylinsky, J. Werner, B. Pearson, S. Thayer, T. Edris, B. Seeley, F. Blood, M. O'Brien, P. Muzyka, D. Lee, J. Sargent, M. Czirr, F. Krotzer, I. Williams, J. Sattler, J. Smallbon, B. Reese, J. Yoder, O. Shabtay, X. Yao, S. Saverys & M. PittelliREFERENCES► Bailes, M., Lyne, A. & Shemar, S. 1990, "A planet orbiting the neutron star PSR1829–10", Nature 352, 311: https://www.nature.com/articles/352311a0MUSICLicensed by SoundStripe.com (SS) [shorturl.at/ptBHI], Artlist.io, via CC Attribution License (https://creativecommons.org/licenses/by/4.0/) or with permission from the artist.0:00: Arc - Hill0:30: Falls - Ripley2:07: Cylinder Seven - Chris Zabriskie6:39: There is But One Good - Hill 24:32: Y - Joachim HeinrichCHAPTERS0:00 Nightmare Scenario2:24 Astronomical Errors4:55 BetterHelp6:39 PSR 18298:49 Matt Bailes Interview24:51 Painful Truths26:54 Outro & Credits#Integrity #Science #CoolWorlds Learn more about your ad choices. Visit megaphone.fm/adchoices
Is there a way to naturally classify the different types of planets in the Universe? Two of the most fundamental properties of any object are its mass and size and generally one expects size to increase as we add more mass. The relationship between size and mass itself changes though at certain points, and this offers a clear way to classify worlds. Graduate student Jingjing Chen of the Cool Worlds Lab discusses one component of her new paper which does just this, classifying planets based off their mass and size and concluding that just four broad categories of planets explain the data.::More about this Video::► Chen & Kipping (2016), "Probabilistic Forecasting of the Masses and Radii of Other Worlds": http://arxiv.org/abs/1603.08614► "Forecaster" open-source software package: https://github.com/chenjj2/forecaster► Outro music by Taylor Davis: https://www.youtube.com/watch?v=dl9kI1yQKZk::Playlists For Channel::Latest Cool Worlds Videos ► http://bit.ly/NewCoolWorldsCool Worlds Research ► http://bit.ly/CoolWorldsResearchGuest Videos ► http://bit.ly/CoolWorldsGuestsQ&A Videos ► http://bit.ly/CoolWorldsQAScience of TV/Film ► http://bit.ly/ScienceMovies::Follow us::SUBSCRIBE to the channel http://bit.ly/CoolWorldsSubscribeCool Worlds Lab http://coolworlds.astro.columbia.eduTwitter https://twitter.com/david_kippingInstagram https://www.instagram.com/cool.worldsTHANKS FOR WATCHING!! Learn more about your ad choices. Visit megaphone.fm/adchoices
The Galaxy is approximately 13 billion years old, which makes one wonder - just how many civilizations could have come and gone across that ocean of time? Today, we try something a little bit different for this channel, and imagine when and how the first civilization could have lived. The story is a fiction, but it provides a narrative around which we can more viscerally experience the conditions of the early cosmos, and the fragility of life itself.Written & presented by Prof David Kipping→ Support our research program: https://www.coolworldslab.com/support→ Get Stash here! https://teespring.com/stores/cool-worlds-storeI'll be speaking at RAND in Santa Monica, March 7th, on the future of space exploration, registration link here: https://www.rand.org/events/2022/03/7-8.htmlTHANK-YOU to our supporters D. Smith, M. Sloan, L. Sanborn, C. Bottaccini, D. Daughaday,A. Jones, S. Brownlee, G. Fulton, N. Kildal, M. Lijoi, Z. Star, E. West, T. Zanjonc, C. Wolfred, F. Rebolledo, L. Skov, E. Wilson, A. de Vaal, M. Elliott, B. Daniluk, M. Forbes, S. Vystoropskyi, S. Lee, Z. Danielson, C. Fitzgerald, V. Alexandrov, L. Macchia, C. Souter, M. Gillette, T. Jeffcoat, H. Jensen, F. Linker, J. Rockett, N. Fredrickson, B. Mlazgar, D. Holland, J. Alexander, E. Hanway, J. Molnar, D. Murphree, S. Hannum, T. Donkin, K. Myers, A. Schoen, K. Dabrowski, J. Black, R. Ramezankhani, J. Armstrong, K. Weber, S. Marks, L. Robinson, F. van Exter, S. Roulier, B. Smith, P. Masterson, R. Sievers, G. Canterbury, J. Kill, J. Cassese, J. Kruger, S. Way, P. Finch, S. Applegate, L. Watson, T. Wheeler, E. Zahnle, N. Gebben, B. Weaver, E. Simonson, M. Murru, M. Shea, P. Finch, R. Boots, S. Applegate, L. Watson, S. Netherclift T. Wheeler T. West A. West H. Kissick, C. MacPherson, D. Bayless, D. Rolfe, E. Zahnle & G. Bolloten.::Music::Music licensed by SoundStripe.com (SS) [shorturl.at/ptBHI], or via Creative Commons (CC) Attribution License (https://creativecommons.org/licenses/by/4.0/), or with permission from the artist► Brad Hill - Fragmented (0:00) [https://open.spotify.com/album/1QDRubBTOO50Kwb8MtRwjF]► Brad Hill - Downcast Spirit (2:10) [https://open.spotify.com/album/2oDAnUfX0OYYOnuIToAEcX]► Brad Hill - The Mysterious (4:43) [https://open.spotify.com/album/69IrML6Y4K3Wh1pZr3L4Jb]► Falls - Life in Binary (7:34)► Brad Hill - Don't Think (11:43) [https://open.spotify.com/album/0i7df7bwsTHcJ7zRCHqq1G]► Brad Hill - Bruised Hope (18:07) [https://open.spotify.com/album/2oDAnUfX0OYYOnuIToAEcX]► Brad Hill - Human Nature (21:03) [https://open.spotify.com/album/1QDRubBTOO50Kwb8MtRwjF]::Film/TV clips used::► Star Trek: Deep Space Nine (1993-1999) Paramount Television► Ad Astra (2019) 20th Century Fox► Alien: Covenant (2017) 20th Century Fox► Knowing (2009) Summit Entertainment► Sunshine (2007) Fox Searchlight Pictures► Noah (2014) Paramount Pictures► Valerian and the City of a Thousand Planets (2017) EuropaCorp Distribution► Clara (2018) D Films► Don't Look Up (2021) Netflix::Chapters::00:00 Teaser02:02 Birth04:27 Home09:47 Society15:09 Collapse18:37 Hope21:44 Legacy23:14 Conclusion24:23 Outro#TheFirstCivilization #Imins #CoolWorlds Learn more about your ad choices. Visit megaphone.fm/adchoices
Proxima Centauri is our nearest star but we still don't know whether it has any planets. Prof Kipping discusses our planet hunting campaign using the space telescope MOST and gives you the latest news.::More about this Video::► Gillon et al. (2016), "Temperate Earth-sized planets transiting a nearby ultracool dwarf star": http://www.nature.com/nature/journal/vaop/ncurrent/full/nature17448.html► Muirhead at al. (2012), "Characterizing the Cool KOIs III. KOI-961: A Small Star with Large Proper Motion and Three Small Planets": http://arxiv.org/abs/1201.2189► MOST telescope homepage: http://most.astro.ubc.ca► Outro music by Taylor Davis: https://www.youtube.com/watch?v=dl9kI1yQKZk::Playlists For Channel::Latest Cool Worlds Videos ► http://bit.ly/NewCoolWorldsCool Worlds Research ► http://bit.ly/CoolWorldsResearchGuest Videos ► http://bit.ly/CoolWorldsGuestsQ&A Videos ► http://bit.ly/CoolWorldsQAScience of TV/Film ► http://bit.ly/ScienceMovies::Follow us::SUBSCRIBE to the channel http://bit.ly/CoolWorldsSubscribeCool Worlds Lab http://coolworlds.astro.columbia.eduTwitter https://twitter.com/david_kippingInstagram https://www.instagram.com/cool.worldsTHANKS FOR WATCHING!! Learn more about your ad choices. Visit megaphone.fm/adchoices
Use code coolworlds at https://incogni.com/coolworlds to get an exclusive 60% off an annual Incogni plan.Déjà vu? Professor Avi Loeb has sparked controversy by suggesting - again - that a recently detected interstellar body passing through the Solar System (3I/ATLAS) could be an alien spacecraft. Today, we dive into what he his claiming and whether it holds up - just the science.Written & presented by Prof. David Kipping, edited by Jorge Casas. Special thanks to Jason Wright for fact checking.→ Support our research: https://www.coolworldslab.com/support→ Get merch: https://crowdmade.com/collections/cool-worlds→ Check out our podcast: www.youtube.com/@CoolWorldsPodcastTHANK-YOU to D. Smith, C. Bottaccini, D. Daughaday, S. Brownlee, E. West, T. Zajonc, A. De Vaal, M. Elliott, B. Daniluk, S. Vystoropskyi, S. Lee, Z. Danielson, C. Fitzgerald, C. Souter, M. Gillette, J. Rockett, M. Sanford, T. Donkin, A. Schoen, K. Dabrowski, J. Armstrong, B. Smith, J. Bergman, C. Macdonald, M. Hedlund, N. Corwin, K. Howard, G. Metts, R. Provost, G. Fullwood, N. De Haan, R. Williams, E. Garland, R. Lovely, D. Compos, F. Demopoulos, T. Edris, M. O'Brien, D. Lee, M. Czirr, I. Williams, B. Reese, A. Nimmerjahn, C. Seay, D. Johnson, L. Cunningham, M. Morrow, M. Campbell, B. Devermont, P. Borisoff, H. Schiff, J. Cos, C. Hansen, R. Chaffee, A. Ortiz, B. McMillan, B. Cartmell, J. Bryant, J. Obioma, M. Zeiler, S. Murray, S. Patterson, C. Kennedy, G. Le Saint, W. Ruf, A. Kochkov, B. Langley, P. Stevenson, T. Ford, A. Laroye, I. Venzor, R. Raszka, B. Gaalen, J. Alley, D. Aron, G. Thomsen, S. Shardool, A. Phan Le, N. Offor, A. Huch, J. Morrison, C. Fitzsimmons, W. Smith, A. Twyman, B. Burgess, B. Bueche, D. Hoffman & J. Murph.REFERENCES► Avi Loeb's blog: https://avi-loeb.medium.com► Hibberd, Crowl & Loeb 2025, "Is the Interstellar Object 3I/ATLAS Alien Technology?": https://arxiv.org/abs/2507.12213► Loeb 2018, "Six Strange Facts About`Oumuamua": https://arxiv.org/abs/1811.08832► Amrhein et al. 2019, "Scientists rise up against statistical significance", Nature, 567, 305-307: https://www.nature.com/articles/d41586-019-00857-9► Tonry et al. 2018: "ATLAS: A High-Cadence All-Sky Survey System", PASP, 130, 064505: https://arxiv.org/abs/1802.00879► Loeb, Hibberd & Crowl 2025: "Intercepting 3I/ATLAS at Closest Approach to Jupiter with the Juno spacecraft": https://arxiv.org/abs/2507.21402► Loeb & MacLeod 2024, "Interstellar meteors from the tidal disruption of rocky planetson eccentric orbits around M dwarfs", A&A, 686, A123: https://arxiv.org/abs/2310.09399► Hopkins et al. 2025, "From a Different Star: 3I/ATLAS in the context of the Ōtautahi-Oxford interstellar object population model", ApJL accepted: https://arxiv.org/abs/2507.05318► Belyakov et al. 2025, "Palomar and Apache Point Spectrophotometry of Interstellar Comet 3I/Atlas", RNAAS, 9, 149: https://arxiv.org/abs/2507.11720► Jewitt et al. 2025, "Hubble Space Telescope Observations of the Interstellar Interloper 3I/ATLAS": https://arxiv.org/abs/2508.02934► Dorman et al. 2013, "The Spatial Distribution of C2, C3 and NH in Comet 2P/Encke", ApJ, 778, 140: https://iopscience.iop.org/article/10.1088/0004-637X/778/2/140/pdfMUSICLicensed by SoundStripe.com (SS) [shorturl.at/ptBHI], Artlist.io, via CC Attribution License (https://creativecommons.org/licenses/by/4.0/) or with permission from the artist.0:00 Chris Zabriskie - Cylinder Two3:38 Chris Zabriskie - Cylinder Three6:01 Triad - Reverence7:37 Chris Zabriskie - Cylinder Four10:30 Jeremy Soule - Silent Footsteps13:15 Jeremy Soule - Dragonsreach15:40 Jeremy Soule - Under the Ancient Sun18:47 Chris Zabriskie - Cylinder Five20:46 Hill - The MeekCHAPTERS0:00 Intro4:35 Trajectory6:04 Incogni7:37 Close Encounters10:50 Speed13:24 Size23:38 Outro#CoolWorlds #3IATLAS #Interstellar Learn more about your ad choices. Visit megaphone.fm/adchoices