A humpback that became stuck in the Baltic seemed to unite a nation in hope. Rescue efforts followed, and then ...

A broad swath of the Pacific Ocean is simmering from an exceptional marine heat wave that scientists warn could just be settling in. Marine animals are already feeling its effects.

The Ocean Census project says scientists have discovered 1,121 previously unknown species in a single year. The rush is on to ...

Ghost forests, the cemetery-like groupings of dead trees killed by saltwater intrusion, have become haunting symbols of sea ...

Brown pelicans and other coastal birds are appearing at rescue centers in droves as Pacific heat wave broils coastal waters ...

At a staggering 3500m below sea level, this frozen abyss is the deepest, darkest and least explored place on land... The ...

The Great Blue Hole looks like one of the most beautiful dive sites on Earth — a nearly perfect dark-blue circle surrounded by shallow turquoise reef. But below the surface, the danger escalates fast: ...

The Blue Hole in Dahab, Egypt, is one of the most beautiful dive sites on Earth – and one of the most feared. In 2000, 22-year-old diving instructor Yuri Lipski entered the water alone with a ...

Far below the ocean's surface, where sunlight fades into a cold blue darkness, the goblin shark moves slowly through the deep ...

Dead gray whales are turning up along the Pacific Northwest at the highest rate in decades, with 16 strandings in Washington ...

A dead whale spotted floating near the Encinitas coastline early Monday was towed out to sea by lifeguards — and followed by a shark — prompting lifeguards to post warning signs at nearby beaches.