The findings potentially solve the paradox of how liquid water seems to have persisted on Mars even when the climate grew too ...

Mars has lost immense amounts of water over it lifetime, and scientists aren't sure exactly how. New research hints that the planet's violently varying tilt may be a key factor. When you purchase ...

Dark “slope streaks,” likely resulting from dust avalanches, stretch across an area of Mars called Acheron Fossae in this image from the High-Resolution Imaging Science Experiment (HiRISE) camera ...

For decades, scientists believed that long, dark streaks on the surface of Mars were a sign of something crucial: running water. These streaks, first spotted by NASA’s Viking mission in 1976, sparked ...

Liquid water once shaped the Martian landscape dramatically, carving valleys, filling lakes, and forming vast oceans. Billions of years ago, during Mars' early days known as the Noachian and Hesperian ...

For years, scientists have been intrigued by mysterious dark streaks running down the slopes of Martian cliffs and craters. These marks, called slope streaks and recurring slope lineae (RSLs), have ...