On Jan. 25, NASA's Mars rover Opportunity is celebrating an amazing 12 years on the Red Planet. Here are just a handful of its biggest discoveries to date.
As NASA's Curiosity rover investigates Mars dunes up close, we're beginning to scratch the surface of a larger, sandy mystery.
Before the first man ever landed on the moon, several nations created the basis for international space law. What does it say, and who does the moon belong to?
Take a peek behind the curtain as the space agency develops humanoid robots that will help humans study other planets.
More than a decade ago, NASA’s Mars Global Surveyor returned stunning images of gullies shaped like water-carved streams on Earth, raising the prospect that Mars may be a friendly haven for life. But appearances can be deceiving.
NASA's Mars rover is investigating some huge 'active' sand dunes on Mount Sharp -- and it looks like it's having some fun.
The first component of the European ExoMars mission is about to take its last long journey before launching to the Red Planet. Follow along with its construction in pictures!
The search for Mars' 'missing' atmospheric carbon has been called off as the planet may not have had a thick ancient atmosphere after all.
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