When the Mediterranean Was a Desert

About six million years ago the Mediterranean was cut off from the Atlantic and shrank dramatically. Where yachts anchor today there were blinding plains of salt, bitter brine lakes and canyons on the scale of the Grand Canyon. Then, in what may have been the largest flood in Earth's history, the Atlantic came back. This is the evidence: a drilling ship that brought up the wrong kind of rock, a buried Nile gorge, the chemistry locked inside the salt, and a 200 km scar under the Strait of Gibraltar. And how sure we really are: how far the sea fell is still debated, and we cover that too. Chapters 00:00 The Paradox 01:36 A Sea That Should Not Exist 04:58 The Wrong Kind of Rock 07:45 Rivers That Fell Off the Edge of the World 10:38 The Great Drying 16:05 The Flood 20:11 How Sure Are We? 22:40 The Desert Beneath Your Holiday Sources 1. Aloisi et al. 2024, Nature Communications 15:9671. doi.org/10.1038/s41467-024-53781-6 2. Garcia-Castellanos et al. 2009, Nature 462:778. doi.org/10.1038/nature08555 3. Hsu, Ryan & Cita 1973, Nature 242:240. doi.org/10.1038/242240a0 4. Ryan, Hsu et al. 1973, Initial Reports of the DSDP Vol. 13 (incl. Chumakov on the buried Nile gorge). deepseadrilling.org/13/dsdp_toc.htm 5. Hsu 1983, The Mediterranean Was a Desert, Princeton UP 6. Roveri et al. 2014, Marine Geology 352:25. doi.org/10.1016/j.margeo.2014.02.002 7. Krijgsman et al. 1999, Nature 400:652. doi.org/10.1038/23231 8. Micallef et al. 2018, Scientific Reports 8:1078. doi.org/10.1038/s41598-018-19446-3 9. Gvirtzman et al. 2022, Communications Earth & Environment 3:216. doi.org/10.1038/s43247-022-00540-4 10. Mascle & Mascle 2019, Mediterranean Geoscience Reviews 1:5. doi.org/10.1007/s42990-019-0002-5 11. Agiadi et al. 2024, Science 385:986. doi.org/10.1126/science.adp3703 12. Soto-Navarro et al. 2010, JGR Oceans 115:C10023. doi.org/10.1029/2010JC006302 13. Herut et al. 2022, Frontiers in Marine Science 9:1040681 14. Britannica: Mediterranean Sea; adiabatic lapse rate 15. Eni press release on Zohr, 30 Aug 2015; TGS note on Zohr 16. The Conversation: Atlantropa, the 1920s plan to dam the Mediterranean 17. Smithsonian Human Origins: Sahelanthropus, Orrorin 18. Messinian reefs of Cabo de Gata (oiccpress.com/gcr/article/view/2804); Pikermi fauna, Univ. of Athens museum 19. NASA Visible Earth and images.nasa.gov 20. NOAA NCEI ETOPO1 global relief model Images Satellite and astronaut photos: NASA (public domain). Brine pools: NOAA Ocean Exploration (PD). Badwater Basin details: US National Park Service (PD). JOIDES Resolution photo: Ocean Drilling Program, courtesy IODP JRSO (PD). Other PD and CC0 images via Wikimedia Commons. The Glomar Challenger appears as our own schematic illustration, not a photo. Maps, animations and "dry basin" views are our own illustrations from NOAA ETOPO1 data, not photographs. Creative Commons images (Wikimedia Commons; title, author, licence; cropped, scaled and panned): CC BY-SA 4.0 (creativecommons.org/licenses/by-sa/4.0): "Aswan High Dam, Construction, 1964 (1)", Manfred Niermann; "Aswan High Dam panorama looking downstream", Visanu Euarchukiati; "Visitors on the salt flats of Badwater Basin, Death Valley National Park, California", Christian David; "Badwater salt formations", Aleksomber; "Death Valley Badwater Basin P4240757", Alexander Migl; "Chickenwire Gypsum anhydrite", M.C. Rygel; "Dead Sea salt formation (Aerial view, 2007)" and "Dead Sea salt formation (Aerial view, 2007) 04", Godot13; "Halite-rock-salt-inowroclaw-poland", Zbynek Burival; "Hipparion brachypus (skeleton) and Cremohipparion mediterraneus skull", Ghedo; "Santorin (GR), Akrotiri, Caldera -- 2017 -- 3005" and "Santorin (GR), Fira, Blick in die Caldera -- 2017 -- 2558", Dietmar Rabich; "NM Gypsum Selenite Cluster", Bryan Barnes; "Alm10KarstEnYesos", Ziegler175. CC BY-SA 3.0 (creativecommons.org/licenses/by-sa/3.0): "Dead Sea salt formation", Tiia Monto; "Grand Canyon Powell Point Evening Light 02 2013", Tuxyso; "Hipparion primigenius 01", H. Zell; "Nea Kameni seen from Fira - Santorini - Greece", Norbert Nagel. CC BY-SA 3.0 ES (creativecommons.org/licenses/by-sa/3.0/es): "Yesos de Sorbas 01" and "Yesos de Sorbas 02", Baldomorejon. CC BY 4.0 (creativecommons.org/licenses/by/4.0): "Nile River, Feluccas, Aswan, Egypt", Vyacheslav Argenberg; "ReflectionProfileDsdpSite121inAlboranSea", W.B.F. Ryan. CC BY 3.0 (creativecommons.org/licenses/by/3.0): "Aswan Nile R23", Marc Ryckaert (MJJR); "Deep Sea Drilling Project microfossils", Hannes Grobe, AWI. CC BY 2.0 (creativecommons.org/licenses/by/2.0): "Halite crystals (four)", James St. John. Music: original score made in-house. Fonts: DM Serif Display, IBM Plex (SIL OFL). Narration: this video uses an AI-generated synthetic voice (Kokoro open-source TTS, stock voice; not a clone of any real person). Script researched, written and fact-checked against the published sources listed above. #Mediterranean #Geology #DeepTime