Drilling into Thwaites Glacier in Antarctica revealed critical data about its rapid melting, with scientists descending 3,000 feet through ice to study the ocean cavity beneath. The team, led by Dr. Won Sang Lee, faced extreme conditions, including shifting glaciers and delayed helicopter landings, to deploy instruments that could predict future sea level rise. Thwaites’ collapse could contribute over 15 feet of global sea level increase, threatening coastal cities within decades.

The mission, part of a broader effort to monitor Antarctic ice loss, faced logistical hurdles, including a ship stranded by sea ice and equipment malfunctions. Dr. Lee, a South Korean geophysicist, emphasized the urgency: “Thwaites is going to be gone, sooner or later. Not on centennial, millennial time scales. It might be within our lifetime.”

Researchers deployed a cable with sensors to measure water temperature and glacier movement, aiming to understand how warm ocean currents destabilize the ice. The data could refine climate models and inform policy decisions.

Despite challenges, the team’s persistence highlighted the global stakes of polar research. “We have to run fast because we were late,” Dr. Lee said, underscoring the race to document Thwaites’ transformation before irreversible changes occur.