03 January 2012, 11:59 AM ET
Spirit and Opportunity have made ground-breaking discoveries on the Red Planet.
21 December 2011, 05:24 PM ET
Flying in space is tough work, and these missions found out the hard way.
21 December 2011, 10:31 AM ET
A look at the most memorable events in spaceflight from 2011.
21 December 2011, 07:00 AM ET
A lot of spacecraft went up this year, and a few came crashing back down.
19 December 2011, 03:36 PM ET
Relive 11 amazing unmanned rocket launches of the year by American launch provider United Launch Alliance.
16 December 2011, 04:52 PM ET
End of a Shuttle era, on-orbit & launch failures, space station completion, and private space growth highlight an exciting year in spaceflight.
16 December 2011, 07:00 AM ET
Curiosity is measuring space radiation during its long flight to the Red Planet.
06 December 2011, 01:01 PM ET
Curiosity's Sample Analysis at Mars (SAM) instrument will analyze organic material.
03 December 2011, 03:02 AM ET
From the launch of the Curiosity rover to a tour of Spaceport America and more, it was a busy week in space.
02 December 2011, 12:40 PM ET
The Mars Science Laboratory is on track and there's no need to adjust its trajectory at this time.
28 November 2011, 02:54 PM ET
A behind-the-scenes look at Curiosity's liftoff and the hoopla surrounding it.
26 November 2011, 03:19 PM ET
The launch of the car-size Curiosity rover was just the beginning.
26 November 2011, 10:05 AM ET
NASA's Mars Science Laboratory, or Curiosity rover, launched to the Red Planet on Nov. 26, 2011.
26 November 2011, 10:03 AM ET
The car-size Curiosity rover has begun its 8 1/2-month journey to Mars.
26 November 2011, 09:55 AM ET
NASA has an ambitious plan for future Mars exploration, including one day sending humans to the Red Planet.
26 November 2011, 09:46 AM ET
The Mars Science Laboratory aka Curiosity was launched from the Kennedy Space Center on November 26, 2011. The 2000 pound rover is scheduled to land on Mars in August 2012.
25 November 2011, 05:56 PM ET
The car-size Curiosity rover is ready to begin its long journey to Mars.
25 November 2011, 05:18 PM ET
Clara Ma, now a ninth-grader, says she's always been interested in space exploration.
25 November 2011, 07:00 AM ET
The three rovers that have already explored Mars have left Curiosity with big tracks to fill.
23 November 2011, 03:07 PM ET
Everything looks good for Curiosity's blastoff, officials say.
23 November 2011, 01:17 PM ET
Curiosity may make it all the way to the top of Gale Crater's huge sediment mound.
23 November 2011, 11:57 AM ET
NASA says that there is little danger from radiation from the launch.
23 November 2011, 11:53 AM ET
NASA is expecting 13,500 people to view the launch of Mars Science Laboratory on Saturday.
23 November 2011, 07:25 AM ET
A look at the Curiosity rover as it was being put together at NASA's Jet Propulsion Lab in California.
22 November 2011, 03:48 PM ET
The Mars Science Laboratory is a key stepping stone in the wider search for alien life in the universe.
22 November 2011, 12:28 PM ET
With a worldwide shortage of plutonium-238, future planetary science missions are in jeopardy.
22 November 2011, 12:15 PM ET
Everything you need to know about the new Mars mission and rover.
22 November 2011, 11:54 AM ET
Mars' thin atmosphere – and lack of magnetic field – lets many charged and neutral particles through. Curiosity rover's Radiation Assessment Detector (RAD) instrument will check to see if astronauts could work there.
22 November 2011, 11:08 AM ET
NASA's Mars Science Laboratory is not intended to find signs of life, but could it?
22 November 2011, 11:00 AM ET
Curiosity, the Mars Science Laboratory, will face challenges getting to the cold dusty world and doing science there. MSL is a very different mission from past Red Planet rovers. Here's how they compare.
21 November 2011, 04:20 PM ET
Martian life may have hard an easier time gaining a foothold long ago.
21 November 2011, 01:32 PM ET
It's not easy reaching Mars. Not at all.
21 November 2011, 08:00 AM ET
The car-size Curiosity rover is due to launch Nov. 26.
21 November 2011, 07:29 AM ET
The Curiosity rover will launch in November 2011 and land on Mars in August 2012.
21 November 2011, 05:27 AM ET
NASA has selected Gale crater as the landing site for the Mars Science Laboratory, scheduled to arrive in August 2012.
20 November 2011, 08:53 AM ET
The Mars Science Laboratory rover Curiosity will now launch Saturday, Nov. 26.