Polar Bears Free Screensaver - Version 2.0.2 Polar bear is the world's largest predator found on land, being twice as big as lions or tigers. The polar bear is an enormously powerful animal that can swim in the water and run over ice very fast.The Polar Bears Free screensaver will show you interesting views of polar bears in different moments of their life at the wild. Install this screensaver on your compter and start your own polar bear safari on the desktop!