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Primatologist Josep Call discusses research designed to test primates’ ability to plan for the future. Primatologist Josep Call discusses research designed to test primates’ ability to solve problems. Primatologist Josep Call explains why it would be interesting to know whether primates can remember and repay favors. Psychologist Felix Warneken explains the importance of observing chimp behavior both in the wild and in controlled experimental environments. Primatologist Christophe Boesch demonstrates and discusses a hive raiding, an aspect of chimpanzee behavior. In this interview from Greenland, glaciologist Mark Fahnestock describes the roar of a 1000-foot iceberg dropping off the Jakobshavn Isbræ into the Ilulissat Icefjord. Includes time-lapse photography of this massive calving event. What controls the speed of Greenland’s big outlet glaciers like the Jakobshavn? How do they interact with the climate system? And most importantly, what does the future hold for the glaciers of Greenland? In this video, glaciologist Mark Fahnestock discusses glacier dynamics and what he hopes to learn through his studies. All wound up with nothing to do? Swing by the Exploratorium on September 6th, beginning at 10am, for the 2008 California State Yo-Yo Championships. Meet National and World Yo-Yo Champions, watch daredevil tricks, and learn basic techniques from yo-yo masters. This event is included in the price of admission to the Exploratorium. Registration is open to the public and begins at 10am. Winners will qualify for next year's regional tournament. For more information, go to www.calstateyoyo.com. The Ice Stories crew caught up with glaciologist Mark Fahnestock on his way back home after a few weeks camping near Greenland's Jakobshavn Isbræ, the most productive and among the fastest-moving glaciers in the world. In this interview, Mark describes some of the physics of this speedy glacier and why so many scientists are interested in studying the dynamics of Jakobshavn. In the summer of 2008, the only helicopter in Kangerlussuaq, Greenland, was effectively grounded by a diamond company, leaving scientists and logistics coordinators to frantically rearrange their field plans.