Antarctica’s Thwaites 'Doomsday Glacier' scientific study blocked by giant iceberg

Antarctica’s 'Doomsday Glacier', nicknamed because it is huge and coming apart, is hindering international efforts to determine how dangerously vulnerable it is. A large iceberg broke off the deteriorating Thwaites glacier and, along with sea ice, it is blocking two research ships with dozens of scientists from examining how fast its crucial ice shelf is falling apart.