Oceans

In July, the Caribbean had about 12,300 square miles of sargassum floating around—enough to blanket Maryland.

Mexico’s Navy is Battling Seaweed Along the Caribbean Coast

Mountains of seaweed are blanketing beaches around the Caribbean Sea and the government is calling everyone to arms

Scientists tracked the growth of young whales compared to images taken last year.

Drones Captured These 'Killer' Whale Family Portraits

Not just beautiful, these photos show that raising killer whale calves is a family affair

Light reflecting off Saturn illuminates the plumes shooting out of Enceladus in this 2013 Cassini image.

NASA Spacecraft Heads for Deepest Ever Dive Into Saturn Moon's Plumes

Cassini will plunge into the watery geysers to search for evidence of hydrothermal vents and other clues about the moon's hidden ocean

Bleached coral pokes through the water's surface off the coast of New Ireland, Papua New Guinea.

Sunscreen May Be Destroying Coral Reefs

Just a tiny amount of a common chemical in sunscreen can bleach and break delicate coral

America's in the Midst of a Lobster Boom

With the lobster catch up sixfold in the last 30 years, can we eat without worry?

Scientists Just Found a Sea Turtle That Glows

The turtle is the first biofluorescent reptile ever found in the wild

King Crabs Are About to Take Over Antarctica

As oceans warm, Antarctica braces for an invasion of shell-cracking crabs

Divers examine ceramic artifacts that may hold clues about ancient medicines, perfumes and food.

Antikythera Shipwreck Yields New Cache of Ancient Treasures

Scientists have recovered more than 50 artifacts from the site, including a bronze armrest that was possibly part of a throne

Reproduction of early English vessels at Jamestown, Virginia.

Rising Seas Threaten to Swallow These Ten Global Wonders

Climate change-induced increases in sea level are forcing archaeologists and communities to get creative and make tough calls

Some Ocean Populations Declined by Nearly 50 Percent Between 1970 and 2012

Is there still a chance to stave off a growing crisis beneath the waves?

Here’s What Would Happen if All the World’s Fossil Fuels Burned Up at the Same Time

Nice knowing you, Antarctica

90 Percent of Seabirds Have Eaten Plastic

And plastic pollution will threaten even more birds as production grows

Are Floating Farms in Our Future?

A Barcelona design firm imagines a two-million-square-foot barge that would yield tons of vegetables, fruit and fish each year

A Woman Just Found a Message in a Bottle From a Century-old Experiment

A German tourist spotted the bottle, which had been intended to measure deep ocean currents

A Manhattan-Sized Glacier Chunk Just Broke Off in Greenland

Glacial calving creates monster icebergs

Opah caught off the coast of Hawaii can weigh 200 pounds.

Taking the Temperature of the First Warmblooded Fish

What can the opah tell us about the deep blue sea

Over 14,000 Miles of America's Coastline is Covered in Concrete

14 percent of America’s coastline is coated in concrete — and that could actually be really bad

Humans take 14 times more adult biomass from the oceans than other marine predators.

Modern Humans Have Become Superpredators

Most other predators target juveniles, but our species tends to kill more full-grown adults

The larger Pacific striped octopus uses unique prankster shoulder-tapping techniques to lure shrimp prey within arms' reach.

Tropical Octopus Definitely Mates Beak-to-Beak

Larger Pacific striped octopus couples engage in a host of behaviors unheard of among other octopuses

Wild pigs go for a dip off Big Major Cay in the Exhumas, Bahamas.

Not Just Dolphins: Where to Swim With Pigs, Penguins and the Gentlest of Sharks

At these beaches, splash around with some more unusual creatures

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