NASA's Curiosity rover has found evidence of water on ancient Mars with "rippled textures" and "landslide debris" in the ...

Mars has never looked more like a planet built for hiding secrets. A cluster of eight vast, water-carved caves appears almost engineered to shield fragile chemistry, or even biology, from the brutal ...

Long before Mars became the cold, dry world we see today, rain once fell across its surface. Water gathered in low-lying valleys and river channels ...

Until now, scientists believed that Mars’ skylights – pits in the surface of mars – were formed by volcanic activity. But ...

Mars often feels finished. Mapped, scanned, labelled in broad strokes. Yet every so often, something unsettles that sense of ...

W hile the northern hemisphere of Earth makes its way through winter, the southern hemisphere of Mars is reaching the end of ...

One giant spider has been observed on Jupiter's moon Europa, sitting right in the middle of its largest crater. Scientists ...

On some Mars images, Olympus Mons does not look dramatic at first glance. It sits there quietly, a wide pale rise against ...

Mercury has long baffled astronomers because it defies much of what we know about planet formation. A new space mission ...

On Dec. 27, 1984, a Mars meteorite was found in Antarctica. The meteorite, known as Allan Hills 84001, was found in Allan ...

Scientists studying volcanic eruptions in Iceland say microbes begin colonizing new lava flows faster and more predictably than once thought.

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