The North Atlantic Ocean is warming up. Higher temperatures and increased human activity in the region can trigger abrupt ...

The High Seas Treaty took effect Jan. 17, creating the first global framework to protect and manage the vast waters beyond national borders that cover more than 40 percent of the planet. Humanity is ...

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

A new decade-long study tracked 37 penguin colonies and found that the birds are breeding earlier. The shift marks one way ...

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 ...