A chunky marine worm with “shimmering, iridescent fringe” washed up on a beach in the U.K. Experts say it’s something called a sea mouse.

A group of friends thought: What if we hiked Half Dome with the cables down in inflatable dino costumes? Then, they did it.

Another “doomsday fish” (a giant oarfish from the deep) washed ashore in Southern California. Are we in for some sort of disaster?

A wildlife photographer spotted a rare all-black king penguin on South Georgia Island and captured some photos and videos. See them here.

A tapir swam for its life as a jaguar stalked it from the riverbank in South America. Do you think it got away?

A California family let their dog out in the morning, and it chased a cat up a tree—except the “cat” was actually a mountain lion.

New research links the sport of mountain biking to an unsettling number of spinal cord injuries. Read more here.

A black bear in Canada was hungry for eagle of all things, so it decided to climb a tree to get to a nest. Watch the insane footage here.

A wildlife photographer captured a video of a osprey vs. pelican mid-air battle. Which bird do you think will fly away with the prized fish?

Four people attempted insurance fraud by submitting insurance claims after a person in a bear costume faked attacks on their vehicles.