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.

Tampa dog owner pries open gator’s jaws to save pet from attack

A Floridian's worst nightmare: a battle between a dog and a gator, but it was no match for the dog's owner, who made sure her beloved pet was coming home and pulled her dog "Kona" from the alligator's grip.

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.

Cougar cubs spotted in Michigan for first time in 100 years

For the first time in a century, cougar cubs have been seen and confirmed in Michigan. The big cats were hunted out of existence in the Upper Peninsula in the early 1900s.

Alaska’s Mount Spurr could erupt in weeks, scientists warn

Scientists warn that Alaska’s Mount Spurr is showing signs of increased activity and could erupt in the coming weeks or months. An eruption could lead to widespread ashfall in Anchorage and surrounding areas, potentially disrupting flights at one of the world’s busiest cargo airports.

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.

Watch: Kayaker gets swallowed by whale – briefly

A kayaker thought he was dead after being briefly swallowed by a humpback whale. His father caught the biblical moment on camera.