A variety of studies are showing that rough-and-tumble play is important for animals and kids alike.

From giant stick bugs to rarely seen sea creatures, these animal videos fascinated us—and led to new scientific discoveries.

From an elusive jaguar to an industrious beaver, photographers captured iconic animal moments around the world.

Unlike its interior cousins, gray wolves of Vancouver Island live with two paws in the ocean and two paws on land.

Scientists are closer than ever to deciphering sperm whale communication. Their breakthroughs could open the door to expanded whale rights and even legal personhood. A pod of sperm whales swims off ...