NASA: Salty sea covered part of Mars
A salty sea once washed over the plains of Mars at the Opportunity rover's landing site, creating a life-friendly environment more earthlike than any known on another world, NASA scientists announced Tuesday.
Possible sighting of Beagle probe
Beagle 2, the British space probe which disappeared as it descended towards Mars, may have been spotted on the surface of the Red Planet, scientists say.
Rover finds Mars was wet enough for life
NASA scientists say their Mars probe has found evidence the red planet was once soaking wet.