Half a century after NASA first placed working hardware on Mars, the agency is preparing to explore not only the planet’s surface, but its skies. The story began on July 20, 1976, when Viking 1 ...

The rusty world is full of mysteries—and some of the solar system's most extreme geology. Learn more about Earth's smaller, colder neighbor.

Solar storms may affect weather on Mars when they strike at the same time as major Martian dust storms, a new study suggests ...

NASA's Viking 1 mission blazed a crucial trail with its Mars landing on July 20, 1976. Now, half a century later, that trail ...

Mars wasn't always frozen and barren. Billions of years ago it had flowing rivers, standing lakes, and possibly oceans. It lost all of it because of something happening deep inside the planet: its ...

At first, Mars was little more than a curved blade of light suspended in darkness. As NASA’s Psyche spacecraft drew nearer, ...

Scientists think ancient Mars was quite different than it is today. While we might know it now as a barred, reddish wasteland ...

Discover more about NASA's Psyche mission and how it recently tested its instruments on the Red Planet.

(NEW YORK) — Mars is a cold, dry, desert-like planet. But billions of years ago, scientific evidence suggests that it had a thick atmosphere, which kept it warm enough to support flowing water on ...

Of the more than 74,000 known meteorites – rocks that fall to Earth from asteroids or planets colliding together – only 385 or so stones came from the planet Mars. It’s not that hard for ...