https://oceanliteracy.unesco.org/ocean-exploration/
https://www.pmel.noaa.gov/eoi/nemo1998/education/pressure.html
https://a-z-animals.com/blog/what-lives-at-the-bottom-of-the-ocean/
https://www.amnh.org/learn-teach/curriculum-collections/deep-sea-vents/global-ocean-circulation-and-deep-sea-temperatures
https://www.pmel.noaa.gov/eoi/nemo1998/education/pressure.html
https://www.ucl.ac.uk/culture-online/ask-expert/your-questions-answered/how-much-pressure-builds-deepest-point-ocean
https://www.technologyreview.com/2019/05/14/135393/the-deepest-ever-dive-to-the-bottom-of-the-mariana-trench-found-litter-there/
https://www.guinnessworldrecords.com/world-records/655646-longest-duration-at-full-ocean-depth-by-a-crewed-vessel
https://www.livescience.com/65468-explorer-breaks-record-deepest-ocean-dive.html
https://www.liveabout.com/facts-about-navy-submarines-405806
https://www.wired.com/2016/08/trust-us-cant-really-turn-truck-submarine/
https://navalpost.com/how-is-life-in-a-submarine-russian-us-china-indian-submarine/
https://www.nasa.gov/mission_pages/NEEMO/facilities.html
https://www.popsci.com/article/science/what-happens-human-who-spends-month-under-sea/