Unseen mountains, valleys, lakes, and rivers lie under Antarctica’s mile-thick ice sheet. Changes to those hidden rivers could have dramatic global consequences.

spacecraft have mapped lunar landscape features over the decades. Meanwhile, charting the ocean floor has presented its own daunting challenges. The intense water pressure found deep in the abyss ...

Ocean water expands as it warms, researchers said. Climate change was a major driver to an unexpected level of sea level rise in 2024, according to a new NASA analysis. Global sea levels rose 0.23 ...