In a quiet corner of an ancient riverbed on Mars, a speckled rock has pushed the search for extraterrestrial life into its ...

Small lakes on ancient Mars may have remained liquid for decades, even with average air temperatures well below freezing.

Mars once had sprawling river systems that rivaled major watersheds on Earth, and scientists have now identified the biggest ...

Scientists have identified eight mysterious water-shaped caves on Mars, unlike volcanic tunnels, raising fresh hopes these ...

New research has mapped 16 extensive, interlaced river systems on Mars, dating back approximately 3.7 billion years to the Early Hesperian Period. These large river systems, despite covering only ...

A long time ago, life left microscopic signatures on Mars — or did it? That's the question NASA scientists have worked for years to answer. On Wednesday, NASA researchers said the answer might be in a ...

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 ...