Want more? Subscribe to NASA on iTunes! http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewPodcast?id=283424434 Earth's polar regions: the "canary in the coal mine" of global climate change. The time to learn more is now. Two years of intensive research and education focused on the Earth's poles began March 1, 2007 with the launch of the International Polar Year (IPY). NASA's Earth orbiting satellite observations play a vital role, giving scientists a bird's eye view - a wide angle, global perspective of these frozen frontiers. In addition, NASA has missions planned to the poles of other solar system bodies...namely, the moon and Mars. For more info: http://www.nasa.gov/ipy
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