The cave bear Ursus spelaeus (and its ancestor Ursus deningeri) is an iconic fossil species in Europe during the Quaternary Period and one of the earliest fossil species recognized by humans. The giant bears once roamed Europe and were known to live in caves. In the evolutionary history of more than...
Antarctica has plenty of sea ice and abundant food sources, but polar bears have nowhere to go. Arctic and Antarctic habitats have many similarities, but the creatures that inhabit them are very different. Both polar regions are home to seals and whales, but only the Nort...