Of course, polar bears can swim, so if they fall through the ice, it isn't a huge issue as far as them drowning or anything.

Many polar bears die by literally drowning when they can’t swim from floe to floe, or because the chunks of ice they are traveling on break up and sink. Polar bears travel enormous ranges and ...

Nora, it appears, is an expert diver. A video shared by the zoo Tuesday morning shows the bear — whose journey to the Rose ...

2006). Researchers found that two to three times as many polar bears were in a fasting state in 2005 and 2006 compared with 1985 and 1986, indicating increased nutritional stress (Cherry et al. 2009).