Polar bears struggling to adapt to longer ice-free Arctic periods
Polar bears use the ice that stretches across the ocean surface in the Arctic during colder months to help them access their main source of prey -- fatty ringed and bearded seals. In the warmer months when the sea ice recedes, they would be expected to conserve their energy and even enter a hibernation-like state. But human caused climate change is extending this ice-free period in parts of the Arctic -- which is warming between two and four times faster than the rest of the world -- and forcing... Читать дальше...