Researchers found increased meltwater and rain explain 60% of a decades-long mismatch between predicted and observed temperatures in the ocean around Antarctica.

Arctic sea ice had its weakest winter buildup since record-keeping began 47 years ago. Scientists say it's a symptom of ...

Sea ice extent is at record, and near record, lows for this time of year in both polar regions, leaving the planet ...

When the U.S. said it had reached an agreement to eliminate the use of force in the Black Sea, it looked like a breakthrough.