Dr. Steven Amstrup and assistant Karyn Rode prepare a large male polar bear for scientific data collection they perform out on the ice of the Bering Sea. This large specimen was captured after being immobilized with a dart from a helicopter. This adult male wasn't even over 1,000 pounds, unlike many Dr. Amstrup captured in the 1980s that would tip the scales considerably over that 1,000-pound mark. Alaska
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