What’s Up With the Weird Pockmarks Up and Down the East Coast?

This video was sponsored by 80,000 Hours. Head to https://80000hours.org/scishow to be sent a free copy of their in-depth career guide and sign up for their newsletter. All along the east coast of the United States there are thousands of oval shaped pock marks, and scientists think they have a clue as to how they got there. Hosted by: Hank Green SciShow is on TikTok! Check us out at https://www.tiktok.com/@scishow ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Huge thanks go to the following Patreon supporters for helping us keep SciShow free for everyone forever: Sam Lutfi, Bryan Cloer, Kevin Bealer, Christoph Schwanke, Tomás Lagos González, Jason A Saslow, Tom Mosner, Jacob, Ash, Eric Jensen, Jeffrey Mckishen, Alex Hackman, Christopher R Boucher, Piya Shedden, Jeremy Mysliwiec, Chris Peters, Dr. Melvin Sanicas, charles george, Adam Brainard, Harrison Mills, Silas Emrys, Alisa Sherbow ---------- Looking for SciShow elsewhere on the internet? SciShow Tangents Podcast: https://scishow-tangents.simplecast.com/ Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Instagram: http://instagram.com/thescishow #SciShow ---------- Sources: https://www.storyblocks.com/ https://www.gettyimages.com/ https://apps.nationalmap.gov/viewer/ https://www.usgs.gov/media/images/thermokarst-lakes-alaska https://commons.wikimedia.org/wiki/File:CarolinaBays-USGS.JPG https://earthobservatory.nasa.gov/images/147904/ice-age-carolinas Bays https://commons.wikimedia.org/wiki/File:WoodsBay_SC_hrdtm.jpg https://commons.wikimedia.org/wiki/File:Robeso2.jpg https://en.m.wikipedia.org/wiki/File:CarolinaBays-USGS.JPG https://commons.wikimedia.org/wiki/File:Carolinabays.jpg Pocosins https://commons.wikimedia.org/wiki/File:Pocosin_Lakes_National_Wildlife_Refuge.jpg https://commons.wikimedia.org/wiki/File:A_shot_of_a_pocosin_wetland_in_North_Carolina.jpg Wildlife https://commons.wikimedia.org/wiki/File:Wood_Stork_Everglades_National_Park_RWD.jpg https://commons.wikimedia.org/wiki/File:WoodStorkWhole.JPG https://commons.wikimedia.org/wiki/File:Ambystoma_cingulatum_USGS.jpg https://commons.wikimedia.org/wiki/File:Frosted_Flatwoods_Salamander.jpg Thermokarst Lake https://commons.wikimedia.org/wiki/File:Permafrost_thaw_ponds_in_Hudson_Bay_Canada_near_Greenland.jpg https://commons.wikimedia.org/wiki/File:Omulyakhskaya_and_Khromskaya_Bays,_Northern_Siberia.jpg Sources https://ncseagrant.ncsu.edu/coastwatch/previous-issues/2015-2/autumn-2015/carolina-bays-another-mans-treasure/ http://archive-srel.uga.edu/outreach/factsheet/carolinabays.html https://www.udel.edu/udaily/2021/december/carolina-bays-investigating-number-characteristics/ https://link.springer.com/chapter/10.1007/978-3-030-40498-7_2 https://www.usu.edu/geo/luminlab/whatis.html https://www.baylor.edu/geosciences/index.php?id=955929 https://link.springer.com/content/pdf/10.1672/0277-5212(2003)023[0550:CBWUHO]2.0.CO;2.pdf https://oceanservice.noaa.gov/facts/pocosin.html https://www.youtube.com/watch?t=397&v=qvSRDgsipkE&feature=youtu.be Other Notes https://repository.lib.ncsu.edu/bitstream/handle/1840.20/38657/Ford,%20Samuel%20final.pdf?sequence=1 https://artsandsciences.sc.edu/cege/resources/scmaps/manual/chap8.pdf