For polar bears, summertime is definitely not when the living is easy.
They are apex predators, mighty hunters, and as Inuit and research scientists have long known, they prefer a good fatty meal of seal, caught from the sea ice.
But during the times of the year when there is no sea ice — and those times are getting longer, due to human-caused climate change — pickings are much more meagre.
In a new study published Tuesday in Nature Communications led by the U.S. Geological Survey (USGS), scientists used GPS tracking, video collars, blood chemistry and other data to track the lives of 20 polar
