Under Thin Ice 　　UNDER THIN ICE follows Canadian extreme divers and cinematographers Jill Heinerth and Mario Cyr on a journey to investigate how Arctic wildlife is adjusting to global warming. 　　The Arctic is a majestic world, home to wildlife rarely seen in the south: bowhead whales, polar bears, narwhals, walrus, seals, zooplankton, algae. At the end of each spring, after long mo...