A Q&A with the lead U.S. scientist of the mission, which will track changes in everything from wetlands to ice sheets to ...

A hotspot that now lies in the middle of the Atlantic Ocean was once under the Great Lakes, and may explain why they formed ...

In Europe and around the globe, melting glaciers are transforming both landscapes and national borders. In this article, Elzė ...

Billions of years ago, in the frigid outer reaches of our solar system, two icy worlds collided. Rather than destroying each ...