From PBS NewsHour.

PBS News Miles O’Brien and his team have joined a group of scientists, engineers and researchers on a voyage to reach the famous Thwaites glacier — a chunk of Antarctic ice the size of Florida that scientists fear could someday collapse and dramatically raise sea levels.

Miles paid a visit to the the surface of the glacier where the team will drill through 3,000 feet of ice to reach and study the Amundsen Sea below.

Join Miles for a quick — and frigid — tour.

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