The 'Great Moose Migration': Millions tune in for Sweden's epic livestream

Like similar eagle nest or fish “doorbell" cams, this remote livestream of an annual moose migration in Sweden is captivating millions on the internet.

Watch: Massive 5,000-pound sunfish dwarfs diver off Mexico coast

A dramatic video captured off the coast of Cabo San Lucas, Mexico, shows a diver appearing tiny next to a massive ocean sunfish.

Deadly toxic algae bloom causing sea lions to become sick, violent

Toxic algae bloom is wreaking havoc on the Southern California coast, especially in local sea lions, causing seizures, stillbirths, even violence.

Watch: Snowboarder outruns avalanche on Mount Washington

Footage from an observatory captures the snowboarder's near encounter with the avalanche in New Hampshire.

Billions of buzzing cicadas will emerge across multiple states this spring

The last time this brood of cicadas saw the sun, President George W. Bush was nearing the end of his presidency and Apple was about to launch the App Store.

These cities are most likely to see an explosion in disease-spreading pests: study

Ticks, mosquitoes, cockroaches and rodents pose serious health risks, experts say. Here’s where you’re most likely to see pest problems in coming months.

Stunning video shows inside of shark's mouth as it chews on diver's camera

Divers off the Bahamas were treated to an up-close view of the inside of a shark’s mouth when the shark swallowed a camera, providing stunning video.

Alaska’s Mount Spurr being closely watched for signs of an explosive eruption

Mount Spurr is part of the Ring of Fire, located in southern Alaska. The mountain is a stratovolcano, which means it has steep slopes and is known for its explosive eruptions. The last major eruption occurred in 1992, which caused a significant disruption in air travel across the Pacific Ocean.

See the rare ‘doomsday’ fish that washed up in Mexico

A rare oarfish, often called the "doomsday fish," was spotted in Mexico—just days after another deep-sea creature, a deep-sea anglerfish, made a rare appearance in daylight.