Once upon a time, there was a lake that was so radioactive, that standing on its shore for more than an hour would almost definitely kill you. Join Olivia to learn how it got that bad in the first place, and what was done to fix it! Hosted by: Olivia Gordon Head to scishowfinds.com/ for hand selected artifacts of the universe! ---------- Support SciShow by becoming a patron on Patreon: www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters: Lazarus G, Sam Lutfi, D.A. Noe, الخليفي سلطان, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, Charles Southerland, Patrick D. Ashmore, charles george, Kevin Bealer, Chris Peters ---------- Looking for SciShow elsewhere on the internet? Facebook: www.facebook.com/scishow Twitter: www.twitter.com/scishow Tumblr: scishow.tumblr.com Instagram: instagram.com/thescishow ---------- Sources: curiosity.com/topics/the-radioactive-lake-karachay-is-the-worlds-most-polluted-place-curiosity/ www.annualreviews.org/doi/abs/10.1146/annurev.eg.18.110193.002451 www.nrc.gov/reading-rm/basic-ref/glossary/lethal-dose-ld.html www.euronuclear.org/info/encyclopedia/l/lethal-dose.htm inis.iaea.org/collection/NCLCollectionStore/_Public/27/002/27002725.pdf pubs.acs.org/doi/pdf/10.1021/ed081p1440 www.nrc.gov/about-nrc/radiation/around-us/doses-daily-lives.html www.nti.org/learn/facilities/894/ www.iaea.org/sites/default/files/35304892833.pdf www.history.com/this-day-in-history/atom-bomb-successfully-tested wiseinternational.org/nuclear-monitor/341/soviet-weapons-plant-pollution www.tandfonline.com/doi/abs/10.1080/00963402.1999.11460370 www.ncbi.nlm.nih.gov/pmc/articles/PMC2672329/ www.safetyinengineering.com/FileUploads/Mayak%20NF%20article_1462201332_2.pdf link.springer.com/article/10.1007%2FBF02408278 pubchem.ncbi.nlm.nih.gov/compound/sodium_nitrate#section=Top www.concrete.org.uk/fingertips-nuggets.asp?cmd=display&id=786 Critical Masses: Citizens, Nuclear Weapons Production, and Environmental Destruction in the United States and Russia; Russell J. Dalton Nuclear Waste: The Problem that Won't Go Away; Nicholas K. Lenssen www.worldatlas.com/articles/10-of-the-world-s-most-radioactive-places.html www.globalsecurity.org/wmd/world/russia/chelyabinsk-65_nuc.htm www.proatom.ru/modules.php?name=News&file=article&sid=7383 news.bbc.co.uk/2/hi/science/nature/5165736.stm www.unscear.org/docs/reports/2008/11-80076_Report_2008_Annex_D.pdf web.archive.org/web/20061004155420/http://www.seattle.battelle.org/RussReg/ResourceCenter/MayakChemicalCombine-RussiaPlutonium.htm