According to a team of scientists led by Dr John Whiteman from the University of Wyoming, polar bears (Ursus maritimus) are unlikely to physiologically compensate for extended food deprivation associated with the ongoing loss of sea ice. Polar bears (Ursus maritimus). Image credit: Steve Amstrup / USFWS. Polar bears walk ice sheet surfaces looking for food. In summer, when the ice melts, their hunting territories dwindle and they may move on shore,...