Nature can be brutal, especially predator-prey interactions. Watch orcas hunt smaller dolphins by head-butting them mid-air here.

A sweet moment caught on video is making lots of people smile. Watch a baby Matschie’s tree kangaroo explore the world.

Whale watchers spotted a rare white southern right whale off the coast of Argentina. See Agustín Baraschi’s beautiful footage.

A young black bear cub mercilessly ambushes its sibling at a watering hole in this funny trail-camera footage.

Research confirms a mountain lion that struggled to stand and walk had the fatal staggering disease. It’s the first case in North America.

A bear tried to steal a man’s backyard bird feeder in Maine this week. The resulting video footage is quite funny.

Cross river gorillas are extremely rare, with only about 300 of them left in the wild. Check out this exciting new trail-cam footage.

A pair of grizzly bears love their clawfoot tub, and they lounge in it every chance they get. Watch the hilarious footage here.

A trio of field biologists heard some eerie vocalizations. Turns out, it was a mountain lion. Hear what sound a mountain lion makes here.

A large baleen whale capsized a 23-foot-long fishing boat with two men onboard, and the video is going viral. See it here.