Millions have seen the heart-wrenching video of a polar bear clinging ... to breathe the bear stands on its hind legs and smacks it on the head with both of its front paws to stun it.

pattern recognition and robot navigation and positioning. First, the center of the label point set and the weighted distance center are obtained in Cartesian coordinates, then the Cartesian ...

Is there anything better than diving into cold water in the summertime? Polar bears love plunging into refreshing water as ...