19 July 2009, 09:10 PM ET
The Mars Spirit robot may be stuck in sand, but is still sending back amazing images.
15 July 2009, 08:17 AM ET
Mars geologist Steve Squyres is optimistic about humanity's chances of getting back to the moon — and even to Mars — in the coming decades.
13 July 2009, 04:50 PM ET
Engineers use test rover to try out movies to free Spirit from Martian Sand.
09 July 2009, 06:57 AM ET
Project Manager John Callas explains how sticking a test rover in a sandbox on Earth could help free Spirit on distant Mars.
30 June 2009, 02:56 PM ET
Test rover is set up in rig built mimic Spirit situation stuck in Martian sand.
29 June 2009, 05:41 AM ET
The public is sending NASA letters with suggestions on how to free its stuck rover Spirit from a sand trap on Mars.
26 June 2009, 07:14 PM ET
NASA has launched a new Web site to chronicle its efforts to save the Mars rover Spirit.
25 June 2009, 04:48 PM ET
23 June 2009, 10:58 AM ET
The United States and Europe are moving closer toward a full-scale collaboration in Mars exploration.
09 June 2009, 10:57 PM ET
At the JPL rover test bed, team members work to free the Spirit rover.
04 June 2009, 11:23 AM ET
Spirit used its robotic arm to take image underneath itself to get better view of sandy trap.
26 May 2009, 01:24 PM ET
NASA's Mars rover Opportunity hits 10 miles on the odometer.
21 May 2009, 02:05 PM ET
Opportunity finds evidence of water acting at Victoria crater; Mars could have had liquid water and still been cold.
21 May 2009, 01:46 PM ET
NASA working to get Spirit unstuck; no plans to retire rovers.
19 May 2009, 10:51 AM ET
Opportunity and Odyssey spacecraft aide in effort to free Spirit rover from Martian sand.
12 May 2009, 09:54 AM ET
NASA's Spirit rover's wheels are stuck in soft dirt on the Martian surface.
24 April 2009, 01:35 PM ET
Spirit begins driving again after recent bouts of amnesia.
20 April 2009, 08:23 PM ET
The Mars Rover Spirit "had a bout of temporary amnesia" on Friday, NASA officials said today.
15 April 2009, 07:06 AM ET
It's a visitor from...somewhere. But where? The Mars Exploration Rover Science Team gets a betting pool going over the origin of the only large rock for miles around; the very rock Opportunity managed to hit on its way to a final landing...
15 April 2009, 06:43 AM ET
Mobility is magic: The Rover team equips their wheeled field geologists with spectrometers, cameras and grinding gear. But the amount and quality of science is massivley multiplied just by moving Spirit and Opportunity around.
15 April 2009, 05:35 AM ET
The Rover team is amazed as Opportunity finds billions of "perfect little spheres" of iron-rich hematite, a strong suggestion that lots of water coursed across what is now the bone dry plains of Meridiani.
15 April 2009, 05:34 AM ET
Every piece of bedrock at Meridiani seems to tell a tale of vast amounts of liquid water, flowing over a long stretch of time; which begs the question: Does water still run on - or in - Planet Mars?
15 April 2009, 04:56 AM ET
"To a certain extent, you make your own luck," says Rover boss Steve Squyres. The bet his team places, by placing one rover down on the plains of Meridiani, begins to pay big immediately; filling in whole chapters of Mars' water story.
15 April 2009, 04:53 AM ET
Yes, they're identical twins. But they've gone in very different directions; done diverse things, in distinctive ways. Members of the Rovers' human family describe dealing with these two robotic characters in their singular situations on Mars.
14 April 2009, 10:53 AM ET
"You really get the sense you can feel those Rovers," claims Arthur Amador as he and other mission managers put themselves in their robotic children's' places: Safe driving from 100 million miles away, across a gulf of complex software and hardware.
14 April 2009, 10:04 AM ET
How does it feel to be standing on another world; one you've thought and dreamed about for decades? Emotional stories of the most poignant pictures from the Mars Exploration Rovers' Panoramic Cameras told by Jim Bell, imaging leader.
14 April 2009, 09:32 AM ET
NASA's Mars Exploration Rover Spirit mysteriously rebooted its computer twice over the weekend; mission controllers are examining data sent back by Spirit to see if they can diagnose the problem behind the glitch.
14 April 2009, 07:28 AM ET
It's a nasty surprise. Scientists target what they think is an old lake-bed. But all Spirit can find is volcanic lava; at least at first. Then their luck changes...
01 April 2009, 09:36 AM ET
Spirit looks back on tracks, sees bright dirt churned up by wheel.
30 March 2009, 09:19 AM ET
Spirit and Opportunity head for next targets; how long they'll last is anyone's guess.
19 March 2009, 04:19 PM ET
ESA's Mars Express finds concentration of rust in Aram Chaos crater.
18 March 2009, 06:12 PM ET
Opportunity's camera caught its first glimpse of the rover's next target, Endeavour Crater.
13 March 2009, 02:07 PM ET
Update for Google Mars 3-D gives access to raw spacecraft data from NASA.
06 March 2009, 09:46 AM ET
The 10 most groundbreaking science missions NASA's ever sent to space.
05 March 2009, 04:01 PM ET
Loose soil piled against a low plateau has blocked NASA’s Mars Exploration Rover Spirit from taking the shortest route to its summer destinations.
19 February 2009, 06:40 PM ET
The Mars rover Spirit more power under its hood thanks to some Martian winds.