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caption: A view from the Big 4 ice caves in Washington from December 2014. Last weekend, warm weather caused a collapsed that killed one hiker and injured five others.
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A view from the Big 4 ice caves in Washington from December 2014. Last weekend, warm weather caused a collapsed that killed one hiker and injured five others.
Credit: Flickr Photo/Michael Matti (CC BY NC ND 2.0)

What You Should Know About The Danger Of Ice Caves

Kim Malcolm talks to Doug Clark, associate professor of geology at Western Washington University, about the different types of ice caves, how they are formed and their risks.

Photo credit: "Big 4 Ice Caves in the Winter," by Michael Matti on Flickr (CC BY NC ND 2.0)