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In this zany competition teachers have ten minutes to create a science activity from a special secret ingredient. This week: eye care products! From atop the Greenland Ice Sheet, Chris Linder, a photographer from Woods Hole Oceanographic Institution, describes observing first-hand the sudden rapid draining of a huge glacial lake. Greenland, icebergs in the Disko Bay near Ilulissat; shot from the vessel Katak, under the midnight sun. Scenery of Ilulissat from a boat, the Katak. Shots of huge icebergs in the Disko Bay, including one with an ice cave. Ice bergs in the Disko Bay outside of Ilulissat. Also shot of boat motoring by icebergs. Greenland, icebergs in the Disko Bay near Ilulissat under the Midnight Sun. Taken from a boat. Sea birds fly through one shot. Greenland, icebergs in the Disko Bay near the town of Ilulissat. Illuminated by the midnight sun. One shot has an ice cave in the iceberg. Greenland, Iceberg shots taken from a boat (in the foreground in 3 shots), in the Disko Bay near Ilulissat, under the midnight sun. On his teams first day out in the field near Kangerlussuaq, geomorphologist Paul Bierman of the University of Vermont explains what kind of rocks they look for to help determine the last time Greenland was free of ice.