Enjoy this 18:01 video tiled "Keepers of the Beat" by the National Park Service
Here's what the National Park Service had to say about its video:
Strung out like pearls on the backs of the mountains, the 700-plus glaciers in the North Cascades add greatly to the quality of lives by providing challenge and inspiration, as well as consistent runoff for salmon, irrigation, and hydroelectricity. In this video, join Dr. Jon Riedel and other glaciologists as they take the pulse of Pacific Northwest glaciers, and learn about the science and motivation behind their work. Learn more about other research in northwest national parks at http://www.nwparkscience.org.