5min Why scientists are so worried about this glacier

text from youtube "It's at the heart of Antarctica and on the verge of collapse. 

Man-made climate change is warming the planet's atmosphere and oceans, and the effects are being felt the most at the poles. In Antarctica, home to the largest chunk of ice on earth, ice shelves and glaciers are beginning to collapse, and one in particular could spell disaster. The Thwaites Glacier, in West Antarctica, has retreated more than 14 kilometers in the last two decades as warm ocean water undermines it. The glacier is situated on a downward slope that falls deep into the center of Antarctica. It's why scientists are racing to find out how close it is to total collapse - and what that would mean for future sea levels. "

1min 30sec @Nasa clip - Flight Over a Rectangular #Iceberg in the Antarctic

Text from youtube "Can you spot the sharp-angled, rectangular iceberg?  This footage (partially sped up) is from an Oct. 16, 2018 flight over the northern Antarctic Peninsula by our Operation IceBridge DC-8 aircraft. Mission Scientist John Sonntag provides commentary. More: https://go.nasa.gov/2JdEy71 

 Operation IceBridge is NASA’s longest-running aerial survey of polar ice. During the survey, designed to assess changes in the ice height of several glaciers draining into the Larsen A, B and C embayments, IceBridge senior support scientist Jeremy Harbeck saw a very sharp-angled, tabular iceberg floating among sea ice just off of the Larsen C ice shelf. A photo of the iceberg (seen at right) was widely shared after it was posted on social media.

1min 14sec @wef clip - 7 things you might not know about #Antartica