Mars may have been a "blue planet" with an ocean the size of today's Arctic Ocean, a new study suggests.

Europa’s subsurface ocean might be getting fed after all. Scientists found that salty, nutrient-rich surface ice can become ...

Our planet is unique for its ability to sustain abundant life. From studies of the rock record, scientists believe life had already emerged on Earth at least 3.5 billion years ago and probably much ...

Each year, vast blooms of phytoplankton spread across the Southern Ocean, drawing carbon dioxide from the atmosphere and fueling Antarctica’s marine food web. For decades, scientists have attributed ...

Marine microbes cooperate far more than they compete, reshaping how scientists understand ocean ecosystems and climate ...

The High Seas Treaty has entered into force, establishing the first legally binding global framework to protect the ...

During the last ice age, the Atlantic Ocean's powerful current system remained active and continued to transport warm, salty ...

It's the first time the ocean has been factored into the cost of carbon.

Evidence from fossil shells suggests that falling seawater calcium helped lock away carbon dioxide and helped cool Earth after the dinosaurs.

A four-year record from the heart of the Ross Ice Shelf shows how subtle changes could shape future sea level rise, ocean ...

A group of German scientists tested the effects of a more acidic ocean on sharks’ teeth and found that future generations of ...

The global cost of greenhouse gas emissions are nearly double what scientists previously thought, according to a study ...