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The Jakobshavn Isbr�� is among the fastest-moving glaciers in the world. The Jakobshavn is an outlet glacier, one of the few places where the giant Greenland ice sheet can shed ice in the form of gigantic icebergs. This timelapse video (60x real-time speed) from glaciologist Mark Fahnestock shows one of these massive calving events. Notice the dark blue ice that surfaces when the iceberg flips over in the ice-choked Ilulissat icefjord.

Working in the snow all day takes a certain type of skill set: digging skills, drilling skills, and snowmobile driving skills. It also helps to love what you do.

While hiking back from a research site near Kangerlussuaq, Greenland, Ice Stories correspondent Billy D'Andrea happened upon a Peregrine Falcon scrape. Two falcons, not too thrilled that he was passing by their cliff-side nest, began circling and screaming to chase him off. In this video, listen for the sound of Wheatears (songbirds) chirping and yipping in the foreground.

Shots of the calving front of the Jakobsavn Glacier, Greenland's fastest moving glacier. Includes two shots of Mark Fahnestock's helicopter flying over.

Climate researcher Billy D'Andrea and colleagues explore the remote "back lakes" of Greenland.

Shots on the Greenland Ice Sheet, including water running off

To understand how Earth���s climate system has changed over time, scientists need to find, develop and use natural recorders of temperature and precipitation. One natural thermometer comes in the form of alkenones: trans-fats produced by certain algae.