Doomsday Glacier, Thwaites Glacier.

The Thwaites Glacier in Antarctica has been nicknamed the "End of the World Glacier" for its potential to flood coastlines around the world if it were to collapse. It already contributes about 4 % to annual sea level rise as it loses ice, and one theory suggests that the glacier could soon begin collapsing into the ocean like a line of dominoes. But is such a rapid collapse really as likely as feared? A new study on Thwaites Glacier's susceptibility to what's known as sea ice reef instability offers some hope. But the findings don't mean Thwaites is stable. (Mathieu Morlighem, The Conversation, more at phys.org )