This edition of The Circle examines polar bear populations in Canada, the U.S., Russia, Greenland and Norway, and what these big, carnivorous mammals need to survive in the coming decades. We know almost nothing about polar bears in half the area they range, so more research could, arguably, top the list. What are the long-term effects of climate change, environmental disasters, industrialization in the far north and the cascading effect of all of these on the arctic marine food web and polar bears?

Here, The Circle presents the most up-to-date information, insight and opinions from scientists, Indigenous Peoples, academics and researchers into the plight of the polar bear.