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00:48:06
In this zany competition teachers have ten minutes to create a science activity from a special secret ingredient. This week: dental hygiene products!

00:02:34
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.

00:02:14
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.

00:01:09
Shots of the calving front of the Jakobsavn Glacier, Greenland's fastest moving glacier. Includes two shots of Mark Fahnestock's helicopter flying over.

00:03:15
Climate researcher Billy D'Andrea and colleagues explore the remote "back lakes" of Greenland.

00:02:35
Shots on the Greenland Ice Sheet, including water running off

00:03:36
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.