Sea ice is dynamic. Winds and currents constantly shape and transform its surface producing pressure ridges and hammocks in one area and creating open water leads in another. It is hard to grasp the natural forces that could cause multi-foot thick ice to heave and buckle forming this winter ice landscape. Fragments of large ice sheets break off from the the north and breakdown over time into smaller icebergs that roll and shift shape. During the winter the icebergs are frozen in place as the sea ice forms around them. Seals like to create dens for pupping where the jumbled fragments meet the icebergs, and Polar bears (ursus maritimus) like to eat seal pups because of their high fact content. Sometimes, after eating, polar bears will climb the icebergs to take a nap.