A massive Antarctic ice shelf is on the brink of collapsing with just a thin sliver of ice holding it in place. The Wilkins Ice Shelf is one of the many victims of global warming which is now in the process of forever altering maps of the long-frozen continent.

“We’ve come to the Wilkins Ice Shelf to see its final death throes,” said David Vaughan, a glaciologist at the British Antarctic Survey after the last plane landed near the narrowest part of the ice.

The flat-top shelf has an area of thousands of square kilometers, jutting 65 ft out of the sea off the Antarctic Peninsula. But recently it is only held there by a thinning 25-mile strip of ice that has eroded to just 500 meters wide at its narrowest point.

In 1950, the strip was almost 100 km wide. The Wilkins Ice Shelf once covered 6,000 sq miles. It has lost a third of its area but is still about the size of Jamaica. Once the strip breaks up, the ocean will sweep away most of the remaining ice. In total, about 25,000 sq km of ice shelves have been lost, changing maps of Antarctica. Here’s a video of the Antarctic Wilkins Ice Shelf collapsing.