A polar bear swam continuously for over nine days, covering 687 kilometers (426 miles), a new study has revealed. Scientists studying bears around the Beaufort sea, north of Alaska, claim this endurance feat could be a result of climate change. Polar bears are known to swim between land and sea ice floes to hunt seals. But the researchers say that increased sea ice melts push polar bears to swim greater distances, risking their own health and future generations.
Link: BBC Earth News