What Happens If You Fall Into the Deep Ocean?

What would really happen if you fell into the deep ocean? We sent BOLT-3, a 38 kg test robot, from the surface all the way to Challenger Deep to find out, depth by depth: pressure, darkness, shipwrecks, dissolving shells, and the weird life that lives down there. Subscribe so BOLT never has to test alone. Next test: you decide, vote in the comments (volcano, desert, or the Sun). CHAPTERS 0:00 The first people at the bottom (Trieste, 1960) 0:31 Today's test subject: BOLT-3 1:13 10 m: Pressure begins 1:49 100 m: Nitrogen narcosis 2:14 200 m: The twilight zone 2:52 500 m: Human limits and saturation diving 3:32 1,000 m: Where the sunlight ends 4:17 2,000 m: Pressure gets strange 4:47 3,340 m: The Titan submersible 5:25 4,000 m: The abyss 6:04 Whale falls and bone-eating worms 6:44 6,000 m: The hadal zone 7:18 10,935 m: Challenger Deep 8:14 Who has really been down there 8:56 Final depth scoreboard SOURCES AND FURTHER READING • NTSB, Titan submersible investigation report (MIR2536): https://www.ntsb.gov/investigations/Accide... • U.S. Coast Guard Marine Board of Investigation, Titan: https://news.uscg.mil/Portals/11/Headquart... • NOAA Ocean Exploration, how much of the ocean has been explored: https://oceanexplorer.noaa.gov/facts/explo... • NOAA, hydrothermal vents fact sheet: https://oceanexplorer.noaa.gov/wp-content/... • NOAA, inert gas narcosis: https://www.omao.noaa.gov/sites/default/fi... • MBARI, whale falls: https://www.mbari.org/news/whale-fall/ • MBARI, vampire squid: https://www.mbari.org/?p=83322/ • U.S. Navy, Project Nekton / Trieste: https://history.navy.mil/content/history/m... • Natural History Museum, deepest fish filmed (8,336 m): https://nhm.ac.uk/discover/news/2023/april... • Chiba et al. 2018, deep-sea debris (Marine Policy): https://pmc.ncbi.nlm.nih.gov/articles/PMC6... • Guinness World Records, solo dive to Challenger Deep: https://www.guinnessworldrecords.com/world... • Marine snow sinking speeds: https://eos.org/research-spotlights/marine... BOLT-3 is a fictional animated character. Depths and figures come from the sources above; some are rounded or described as approximate in the video. Music and sound effects: licensed/original assets (see channel info). Voice: synthetic narration. #deepocean #whathappensif #sciencefacts