Thorsten Markus, a current JCET sponsor and former JCET faculty member, was featured in the second of a series of ICESat podcasts featured on EarthSky on May 3, 2010. He discusses the thinning sea ice, the importance of sea ice to the global climate system, Operation Ice Bridge, and ICESat-2. To view and listen, please visit the following link: http://earthsky.org/earth/thorsten-markus-sees-earths-sea-ice-thinning.