Antarctic ‘Doomsday Glacier’ near tipping point, unmanned submarine reveals

A robotic submarine has returned from the dark underbelly of one of the Antarctic bigger glaciers with scary news – it might melt faster than we previously thought.

The Thwaites Glacier, a gigantic ice shelf in West Antarctica, has been on the radar of climatologists for two decades now. But they didn’t know how fast the glacier was melting, and how close it was to complete collapse, until researchers sent an unmanned submarine under the pack ice.