While polar bear claws reach up to 3.75 inches long, grizzly bear claws can grow to up to four inches. Sun bears also have claws that can reach four inches.

In the remote, icy expanse of the Arctic, the survival of a species begins with a remarkable act of resilience and devotion.

Bears have sharp claws and use them to gather food. They also have unique feet. Their pads have a characteristic called plantigrade. When they walk their toes, sole and heel all touch the ground ...