In 2014, US Geological Survey biologists put camera-equipped radio collars on four female polar bears near Prudhoe Bay, Alaska. This is what they see.
The video, which is the first ever from a free-ranging polar bear on Arctic sea ice, shows an interaction with a potential mate, playing with food, and swimming at the water's surface and under the sea ice. These videos will be used by the US Geological Survey in research to understand polar bear behavior and energetics in an Arctic with declining sea ice.
Video: Paul Laustsen/USGS Office of Communications and Publishing)