Oceans

The rare green sea turtle, shown here on a volcanic beach in the Pacific, made a mysterious reappearance on Bermuda's shores in 2015.

The Strange Reappearance of the Once-Vanished Green Sea Turtle

It's a conservation biology riddle wrapped in a mystery inside a hard shell

African penguins at the Cincinnati Zoo

The Search for Buddy the Kidnapped Penguin Continues

Two students stole and released an endangered African penguin from an Oceanarium. The problem is Buddy doesn't have the skills to survive

Inside the World's First Large-Scale Effort to Harness Tidal Energy

Next month, the UK-based company MeyGen will install four underwater turbines off the coast of Scotland

A reef off the coast of Bonaire

Jacques Cousteau's Grandson Is 3D Printing Coral Reefs

Fabien Cousteau, descendant of the famous sea explorer, is working on a project to bring 3D printed coral reefs to the Caribbean island of Bonaire

A hammerhead caught on a longline.

Is It Too Late to Save Red Sea Sharks?

With anti-fishing laws virtually unenforced, sharks off the coast of Saudi Arabia are being fished to death

The Boston Light still shines brightly at night in Boston Harbor.

The Oldest Lighthouse in the United States Just Celebrated 300 Years of Service

The Boston Light still welcomes sailors to Boston Harbor

A Fresnel lens from the Boon Island Lighthouse off of southern Maine.

The U.S. Government Is Suing for a Set of Lighthouse Lenses

The lenses could be worth up to $600,000

The monument protects an array of endemic, threatened and endangered species, including the sperm whale.

Obama Declares the First Atlantic Ocean National Marine Monument

With the announcement of the Northeast Canyons and Seamounts Marine National Monument, Obama solidifies his legacy as an ocean guardian

Awesome New Maps Show Alaska in High-Resolution Detail

The ArcticDEMs are the first set of detailed elevation maps of the Great White North

Hurricanes Madeline and Lester

The Science Behind Hawaii's Double Hurricane

Having two cyclones in the ocean is not rare, but when they get too close to each other things can get crazy

LiDAR imaging of the bioherms beyond the Great Barrier Reef, which is marked in red.

The Great Barrier Reef Has Been Hiding Another Massive Reef

The iconic coral reef sits above an even deeper one

Rare Great White Shark Nursery Discovered Off the Coast of New York

Researchers find North Atlantic great whites spend their first 20 years in the waters off Montauk, Long Island

Papahānaumokuākea may be a mouthful, but now it's the world's largest marine protected area.

President Obama Just Created the World's Largest Marine Protected Area

Papahānaumokuākea Marine National Monument is now twice the size of Texas

This 340-Million-Year-Old Ocean Crust Could Date Back to Pangaea

Researchers believe they've found the world's oldest ocean crust

Adorable Stubby Squid Found Off the Coast of Southern California

Researchers aboard the E/V Nautilus happened across a particularly cute stubby squid

Eerie Video Shows How Coral Bleaches

Time-lapse video captures the coral's convulsions while it expels the algae that give it color

Move over, tortoises: These sharks take the prize for oldest living vertebrate.

These Ridiculously Long-Lived Sharks Are Older Than the United States, and Still Living It Up

The lifespans of these marine methuselahs may double those of oldest living tortoises, a creative dating method finds

California condors rebounded after almost going extinct—but that doesn't mean the precious, weird birds are in the clear.

Humans Still Threaten Endangered Condors

Thanks to industrial byproducts and pesticides, birds face more contamination than their cousins inland

Sharks are a broad and diverse group of species, but in the public imagination we tend to treat them all the same.

Humans Have Promoted the Reef Shark to Apex Predator

How these diverse predators ended up getting all the credit

Rising drought. Surging seas. Spiking temperatures. 2015 was just another year in a long pattern of Earth's changing climate.

World’s Climate Hit Extremes, Shattered Multiple Records in 2015

From rising temperatures and ocean levels to record greenhouse gas levels, 2015 was a rough year for planet Earth

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