|An ice bridge collapses spectacularly at a|
Patagonian glacier recently.
The video, which you can see below, is quite spectacular. It's worth the watch.
Collapsing glaciers really are stock footage when people want to illustrate the effects of climate change, but in this case, climate change has nothing to do with the drama.
Instead, the glacier advances over Lake Argentina, damming it. The water eventually tunnels beneath the glacier, forming a giant ice bridge.
The water continues to erode the ice under the bridge until it can no longer support its own weight. Then it collapses in dramatic fashion as you see in the video.
The process at this particular glacier repeats itself roughly once every four years, give or take.
Here's the video: