Could a massive release of methane from the ocean trigger a global catastrophe? Scientists investigate vast stores of methane hidden beneath the seafloor and a controversial theory that an oceanic eruption may have contributed to the greatest mass extinction in Earth’s history. From the deadly Lake Nyos gas disaster to methane hydrates, runaway global warming, massive tsunamis and explosive firestorms, explore what could happen if enormous quantities of trapped methane were suddenly released in this full episode of Mega Disasters. Subscribe for more full episodes from The HISTORY Channel: http://histv.co/SubscribeHistoryYT Check out exclusive The HISTORY Channel content: History Newsletter - https://histv.co/newsletter Website - https://histv.co/History Facebook - https://histv.co/Facebook Instagram - https://www.instagram.com/history TikTok - https://www.tiktok.com/@history The HISTORY® Channel, a division of A+E Global Media, is the premier destination for historical storytelling. From best-in-class documentary events, to a signature slate of industry leading nonfiction series and premium fact-based scripted programming, The HISTORY® Channel serves as the most trustworthy source of informational entertainment in media. The HISTORY® channel has been named the #1 U.S. TV network in buzz for seven consecutive years by YouGov BrandIndex, and a top favorite TV network by Beta Research Corporation. For a deeper dive, visit history.com or follow @history on Instagram, Twitter, Facebook, YouTube and TikTok.