Our climate reporter Raymond Zhong explains why ​​Antarctica’s fast-melting Thwaites Glacier is crucial for scientists who are trying to better understand rising global sea levels. For the next two months, Raymond and our photographer, Chang W. Lee, are traveling with researchers who are on an expedition to study the glacier. Tap the link in our bio to follow their dispatches at nytimes.com/antarctica. Video by Raymond Zhong, Kassie Bracken, Christina Thornell, Jon Miller, Stephanie Swart, Leila Medina, Phil Caller and Nikolay Nikolov/The New York Times #thwaitesglacier #climate #climatechange #science #nytantarctica