Our climate reporter Raymond Zhong describes how the fast-melting Thwaites Glacier of Antarctica, which we’re visiting, is like a cork in a bottle: If it starts to really disintegrate, many more glaciers around it could do the same, with major consequences for sea levels. Learn more and send our Climate team your questions about the trip: nytimes.com/antarctica Video by Raymond Zhong, Christina Thornell, Kassie Bracken, Leila Medina, Thomas Vollkommer, Edward Vega, Jon Hazell, Stephanie Swart and Phil Caller #antarctica #helicopter #survivaltraining #survival #nytantarctica Subscribe: bit.ly/U8Ys7n More from The New York Times Video: nytimes.com/video ---------- Whether it's reporting on conflicts abroad and political divisions at home, or covering the latest style trends and scientific developments, New York Times video journalists provide a revealing and unforgettable view of the world. It's all the news that's fit to watch.