Despite decades of diligent research, there's still so much that we don't know about the deep sea. Join us for a new episode of SciShow as Hank Green takes you through seven unsolved mysteries about the deep ocean that will blow your mind! ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters -- we couldn't make SciShow without them! Shout out to Justin Ove, Accalia Elementia, Kathy & Tim Philip, Kevin Bealer, Justin Lentz, Fatima Iqbal, Linnea Boyev, Tomasz Jonarski, Chris Peters, Philippe von Bergen, Will and Sonja Marple, and Mark Terrio-Cameron. ---------- Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: null ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com/ Instagram: http://instagram.com/thescishow ---------- Sources: The Ocean Floor http://www.scientificamerican.com/article/just-how-little-do-we-know-about-the-ocean-floor/ http://oceanservice.noaa.gov/facts/exploration.html http://www.abc.net.au/news/2014-09-27/deep-sea-volcanoes-discovered-in-search-for-mh370/5774122 http://www.nature.com/news/gravity-map-uncovers-sea-floor-surprises-1.16048 http://science.sciencemag.org/content/346/6205/65 https://www.ngdc.noaa.gov/mgg/bathymetry/predicted/explore.HTML#sat_alt http://www.slate.com/blogs/bad_astronomy/2016/01/14/gravity_map_of_the_ocean_floor_reveals_new_features.html Beneath the Seafloor http://science.sciencemag.org/content/349/6246/420 http://science.sciencemag.org/content/349/6246/376 http://www.sciencemag.org/news/2015/07/its-going-pluto-and-seeing-mcdonalds http://www.sciencedaily.com/releases/2013/12/131208085304.htm Brine Pools http://oceanexplorer.noaa.gov/explorations/02mexico/background/brinepool/brinepool.html http://blogs.scientificamerican.com/artful-amoeba/playing-in-a-deep-sea-brine-pool-is-fun-as-long-as-you-re-an-rov-video/ http://www.nautiluslive.org/blog/2014/07/08/brine-pool-dive-overview http://www.joyeresearchgroup.uga.edu/research/deep-sea-extreme-environments/cold-seeps/brine-seeps/brine-seep-microbial-observatory Milky Seas http://biolum.eemb.ucsb.edu/organism/milkysea.html http://aem.asm.org/content/72/4/2295.full http://www.nrl.navy.mil/content_images/07FA6.pdf http://www.pnas.org/content/102/40/14181.full.pdf http://www.abc.net.au/news/2015-05-19/sea-sparkles-put-on-sensational-light-show-in-southern-tasmania/6480996 Unidentified Sounds http://oceanexplorer.noaa.gov/technology/tools/acoustics/acoustics.html http://www.wired.co.uk/news/archive/2012-11/29/bloop-mystery-not-solved-sort-of http://www.pmel.noaa.gov/acoustics/ http://www.pmel.noaa.gov/acoustics/sounds/upsweep.html http://www.pmel.noaa.gov/acoustics/sounds/bloop.html The 52Hz Whale http://www.pmel.noaa.gov/acoustics/whales/sounds/sounds_52blue.html http://www.nytimes.com/2004/12/21/science/21whal.html?_r=3 http://www.smithsonianmag.com/smart-news/maybe-worlds-loneliest-whale-isnt-so-isolated-after-all-180955005/?no-ist http://www.slate.com/blogs/wild_things/2014/08/27/_52_blue_the_loneliest_whale_in_the_world.html Abyssal Gigantism http://link.springer.com/article/10.1023%2FA%3A1012336823275 http://www.zmescience.com/science/biology/deep-sea-giant-creature/ https://universe-review.ca/R10-35-metabolic.htm http://jeb.biologists.org/content/215/12/1995