Picture the vast expanse of ocean you've seen in postcards or vacation photos - that brilliant blue stretching endlessly toward the horizon. Yet something profound is happening beneath those familiar ...

Satellite observations have documented a pronounced decline in Antarctic sea ice extent since 2014, with especially sharp losses in recent years. Whether Antarctica's declining sea ice can recover ...

The Earth’s climate has fluctuated between cold and warm periods for millions of years. During the so-called “lukewarm interglacials” – warm phases between 800,000 and 430,000 years ago – atmospheric ...

As the North Pole, the Arctic Ocean, and the surrounding Arctic land warm rapidly, scientists are racing to understand the warming’s effects on Arctic ecosystems. With shrinking sea ice, more light ...