15 February 2005, 04:01 PM ET
NASA's Spirit rover found a new class of rock on Mars that provides additional clues to the planet's watery past.
25 January 2005, 07:00 AM ET
Today Opportunity officially hits the one-year mark in its mission to explore Mars and send home data about the red planet's conditions and its history of water.
20 January 2005, 10:25 AM ET
The discovery of an iron meteorite sitting on Mars by NASA’s Opportunity rover has kick-started a wide-ranging discussion as to what the find may be telling us about the planet itself, past water conditions there, and just how peppered the red planet migh
17 January 2005, 08:02 AM ET
Scientists controlling the Opportunity Mars rover are taking an up-close look at an intriguing pitted rock on Mars, now dubbed "Heat Shield Rock".
04 January 2005, 07:00 AM ET
It's been a watershed year of science for the NASA Mars rover Spirit, a six-wheeled automaton that continues to probe the red planet's secrets as it clambers up the Columbia Hills.
03 January 2005, 07:00 AM ET
The Mars rover Spirit has come a long way since it hurtled down through the red planet's atmosphere and came to a bouncy, airbag-protected stop at Gusev Crater on Jan. 3, 2004. One year later, NASA celebrates.
31 December 2004, 03:47 PM ET
BOULDER, Colo. -- Like the adage here on Earth, so goes it for Mars: One person’s junk is another’s gold mine -- in this case, charred and busted up pieces of a heat shield.
27 December 2004, 09:40 AM ET
NASA’s Opportunity Mars Exploration Rover is wheeling about a field of spacecraft litter – the remains of heat shield hardware that protected the robot from its plunge through the martian atmosphere last January.
13 December 2004, 04:00 PM ET
SAN FRANCISCO - NASA's Mars rovers have returned new evidence for past water, pictures of Earth-like clouds seen for the first time from the planet's surface, and a rock that doesn't look like anything scientists have ever seen.
02 December 2004, 02:00 PM ET
The success of NASA's Mars rover Opportunity in finding tell-tale signs of past water at its Meridiani Planum landing site has left some researchers believing the region could have once been a habitable, albeit hostile, environment.
11 November 2004, 06:00 PM ET
NASA's Mars rover Opportunity will back its way out of a crater it has spent four months exploring after reaching terrain that appears too treacherous to tread.
27 October 2004, 11:26 AM ET
Those work-a-day robots – Spirit and Opportunity – remain steadfast in their Mars research duties.
21 October 2004, 06:41 PM ET
A steering problem that plagued NASAï¿½s Spirit Mars rover driving abilities has resurfaced almost two weeks after it first appeared.
15 October 2004, 06:47 AM ET
There is mounting evidence of the role of water in Mars’ evolution. That fact appears to have been favorable to the development of life -- and the leftover calling card of past biology may be preserved in that world’s geologic record.
07 October 2004, 04:00 PM ET
NASA's Mars rover Opportunity has found - almost by accident - a rock that may point to a second water event in the red planet's past. Meanwhile, it's robotic twin Spirit on the other side of the planet has overcome its recent steering glitch.
04 October 2004, 05:30 AM ET
The researchers and engineers behind NASA's double rover mission to Mars have been given a reprieve of sorts, the chance to work from home during the next six months of their extended expedition.
28 September 2004, 07:09 AM ET
The image shows a dark dot identified as the rover Spirit next to giant Bonneville Crater and the thin dark line, its tracks.
08 September 2004, 03:36 PM ET
NASA's Mars rover Opportunity found evidence for a lake or sea on Mars, and new research suggests the body of water was deep, large and long-lasting.
18 August 2004, 04:30 PM ET
The Mars rover Spirit, while some showing signs of age, has found signs that water once flowed atop the rocks of its Gusev Crater landing site. The Opportunity rover, at the bottom of Endurance Crater, has found a mysterious rock and a batch of red spheru
09 August 2004, 04:00 AM ET
A future astronaut traipsing across the landing sites of the Mars Exploration Rovers - Spirit and Opportunity ï¿½ might be squishing into a welcome mat of microbes, according to one NASA scientist.
06 August 2004, 09:45 AM ET
04 August 2004, 07:04 PM ET
Both of NASA's Mars rovers experienced problems this week as they enter unknown engineering territory, operating well beyond their what the original blueprints called for.
17 February 2004, 02:00 PM ET
Water was common across a vast region of ancient Mars, creating habitable conditions for long stretches of time billions of years ago, scientists said Thursday.