BBC - Nature’s great events
photos by mathieu bélanger in lac saint-jean, quebec. canada is home to around 15,000 of the estimated 20,000 polar bears in the world. according to the u.s. geological survey, polar bear populations, given current global warming trends, could see a decline of two thirds by 2050 as a shrinking arctic icepack restricts their offshore hunting range.
photos by paul souders in the hudson bay. polar bear fur is actually transparent — like snow, it only appears white because it reflects visible light — while their skin is actually black, thus helping keep them warm. polar bears are excellent swimmers thanks in part to the slight webbing of their front paws. more polar bear photos by paul souders