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Steve Amstrup and Geoff York, USGS biologists, using a block and tackle device to take the weight of a large male polar bear (Ursus maritimus). He was 982 lbs. Kaktovik, Alaska.

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Alaska Arctic Beaufort Sea Horizontal Katovik PBI Polar Bear Research Ursus Maritimus Wildlife Research people science scientific research vertical
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Steve Amstrup and Geoff York, USGS biologists, using a block and tackle device to take the weight of a large male polar bear (Ursus maritimus).  He was 982 lbs. Kaktovik, Alaska.
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