This Antarctic glacier dramatically retreated. Then, its ice shelf totally collapsed (satellite image) 

 This might indicate a "glaciological tipping point" on the Antarctic Peninsula, an important consideration as global warming continues to affect ocean temperatures. 

https://cdn.mos.cms.futurecdn.net/SLVyZn7TN7gmX7h8HJHnf7.jpg

https://www.space.com/satellites-cadman-glacier-antarctica-retreat-ice-shelf-collapse