What If You Dived to the Deepest Point on Earth?

What would it actually be like to dive almost 11 kilometres down, to the bottom of the Mariana Trench? You squeeze into a titanium ball 1.5 metres wide and sink for hours: past the last sunlight, through the midnight zone full of glowing animals, past the depth of the Titanic and into the trench itself, where the pressure is more than a thousand times what you feel right now. At the bottom: fish that look like glass, giant single cells, amphipods that eat wood... and a plastic bag. Chapters: 0:00 The Deepest Dive 0:47 The Surface 1:34 The Last Light 2:47 The Midnight Zone 3:53 The Pressure 5:05 Into the Trench 6:01 The Last Fish 6:50 The Bottom of the World 9:02 The Way Up Every number in this video comes from real measurements and expeditions. The pilot ("you") and the submarine are fictional; the 1960 Trieste dive is shown as a simplified model. Sources: Challenger Deep depth ~10,935 m: Greenaway et al. 2021 (Deep-Sea Research I) Bottom pressure ~1,100 bar: NOAA-PMEL bottom sensor (11,161 dbar at 10,830 m); hull design 1,127 bar (Triton Submarines) Ocean light zones: NOAA Ocean Exploration Bioluminescence ~76% of open-ocean animals: Martini & Haddock 2017 (Scientific Reports) Deepest fish filmed, snailfish at 8,336 m (2022): University of Western Australia / Tokyo University of Marine Science and Technology Fish depth limit ~8,200 m: Yancey et al. 2014 (PNAS) Hirondellea gigas digests wood: Kobayashi et al. 2012 (PLoS ONE) Xenophyophores at 10,641 m (Sirena Deep): Scripps Institution of Oceanography, 2011 Plastic bag at 10,898 m: Chiba et al. 2018 (Marine Policy), JAMSTEC Deep-sea Debris Database Pollutants in trench amphipods: Jamieson et al. 2017 (Nature Ecology & Evolution) Trieste 1960 dive (Piccard & Walsh): U.S. Navy / Naval History and Heritage Command Deepest scuba dive 332.35 m: Guinness World Records Cuvier's beaked whale dive 2,992 m: Schorr et al. 2014 (PLoS ONE) Seafloor mapped ~27%: The Nippon Foundation-GEBCO Seabed 2030 Bathymetry: NOAA ETOPO1 (public domain) All visuals are 3D animation created in code. Music and sound effects: Epidemic Sound. #marianatrench #ocean #deepsea #science #documentary #challengerdeep