Polar bears in the Arctic are turning to bird eggs as a food source as the melting of sea ice makes it harder for them to catch seals. A team led by Charmain Hamilton of the Norwegian Polar Institute monitored the movements of polar bears and seals before and after a sudden decline in sea ice in 2006, which altered coastal areas in the Norwegian archipelago of Svalbard. The researchers attached tracking devices to 60 ringed seals and 67 polar bears, which allowed them to compare their movements before and after the ice collapse.