Ancient Mars is starting to look less like a scattered patchwork of dried-up valleys and more like a planet once ruled by continent-scale rivers. For the first time, scientists have traced giant ...

Scientists have mapped out ancient, large-scale river systems across the surface of Mars, providing compelling evidence of the Red Planet’s watery past. These river networks, which bear a striking ...

Mars once had sprawling river systems that rivaled major watersheds on Earth, and scientists have now identified the biggest ones for the first time. Researchers mapped 16 massive drainage basins ...

Long before Mars turned into the frozen desert you see today, water shaped its surface in dramatic ways. Rivers cut through highlands, lakes pooled inside craters, and floods tore open canyon walls.

Scientists studying Mars may have uncovered a brand-new mineral hidden in the planet’s ancient sulfate deposits. By combining laboratory experiments with orbital data, researchers identified an ...

You’ve probably followed the Mars rover missions on and off for years, watching those red-dust landscapes scroll across your TV screen and wondering: Could something have lived there once? Now, after ...

NASA's Curiosity rover just found bizarre nodules on giant Martian "spiderwebs." Scientists are puzzled.

Scientists suspect that the surface of Mars was once teeming with water, a lush oasis full of river systems and lakes — until a dramatic change in the planet’s magnetic field caused it to lose most of ...

Light-colored rocks scattered across Mars have become a quiet clue to a louder story about the planet’s past. NASA’s Perseverance rover keeps finding pale pebbles, cobbles and even small boulders ...

Scientists believe these rocks were formed by ancient rainfall, similar to how they form in tropical climates on Earth. The discovery adds to the evidence that Mars may have once been a habitable ...