Something is pumping out large amounts of oxygen at the bottom of the Pacific Ocean, at depths where a total lack of sunlight makes photosynthesis impossible. The phenomenon was discovered in a region ...

The south-western Baltic Sea has about 3,000 kilograms of dissolved toxic chemicals released from unexploded ordnance, according to a new study. The substances were detected in almost all water ...

The growing battle over how to manage sea level rise turns partly on a legal principle set down in Roman times. By Cornelia Dean Cornelia Dean is a science writer and former science editor of The New ...