29 January 2014, 01:01 PM ET
Astronomers have come to realize that the asteroids in the main belt between Mars and Jupiter are incredibly diverse in size and composition, implying that they were scattered here and there by migrating planets long ago.
28 January 2014, 05:25 PM ET
MarsCrew134's crew engineer Ewan Reid is testing a rover carrying a terrain mapping pair of stereo cameras and equipment to test long range robotic control during a two week human Mars mission simulation in high altitude Utah.
27 January 2014, 07:12 PM ET
If astronauts are to terraform Mars, agriculture may rely on Earth microbes improving Martian soil.
27 January 2014, 09:30 AM ET
MarsCrew134 is simulating the exploration of Mars in high altitude Utah. Crew scientist Michaela Musilova is adding organisms from Earth's extreme environments to the Utah soil samples to create organics, and important step in terraforming Mars.
24 January 2014, 06:45 PM ET
Even ‘Star Trek’ actor William Shatner wants to know about the weird “jelly doughnut” rock on Mars found by NASA’s Opportunity rover. Steve Squyres, Principal Investigator of the Mars Exploration Rover Program explains.
24 January 2014, 06:19 PM ET
This week, a team of scientists and engineers began a two-week field simulation of a mission to Mars.
24 January 2014, 02:48 PM ET
MarsCrew134 is simulating the life of engineers and scientists in the harsh conditions of Mars. Crew Commander Ashley Dale talks about the mission and introduces his team.
24 January 2014, 10:06 AM ET
After 10 years on the Martian surface, the rover continues to deliver new discoveries about the 4th planet from the Sun. Here are some of the highlights.
24 January 2014, 10:02 AM ET
The harsh conditions have created issues with a piece of machinery that has not been serviced by human hands in over 10 years. The Opportunity team discusses what they have had to contend with.
24 January 2014, 09:05 AM ET
Some of the engineers were still in school when the the Spirit and Opportunity landed on Mars. Today they are living out their dream and extending the original 90-day mission to 10+ years. Hear their stories.
24 January 2014, 07:00 AM ET
Rover deputy principal investigator Ray Arvidson, of Washington University in St. Louis, submitted a personal Spirit and Opportunity Top 10 list to SPACE.com to mark the mission's 10 years of Mars exploration.
24 January 2014, 06:00 AM ET
For 10 years the robots have roved across Mars, making exciting discoveries about water in the planet's past.
23 January 2014, 02:01 PM ET
Mars may have been capable of supporting microbial life for hundreds of millions of years in the ancient past, recent findings from NASA's Opportunity and Curiosity rovers suggest.
23 January 2014, 02:01 PM ET
NASA's Spirit and Opportunity rovers touched down on Mars in January 2004, tasked with 90-day missions to search for signs of past water activity. Rover project manager John Callas reflects on a decade of discovery from this mission, which is still going
23 January 2014, 12:50 PM ET
Martian art and Red Planet science meet in a new exhibition celebrating 10 years of Mars exploration with two twin rovers.
23 January 2014, 11:29 AM ET
In January 2014, a team of scientists ventured to the Utah desert for a two-week Mars mission simulation. See what the mock Mars mission was like for SPACE.com contributor Elizabeth Howell.
23 January 2014, 08:45 AM ET
Fresh of a mock mission to Mars, SPACE.com contributor Elizabeth Howell will host an exciting "Ask Me Anything" session on Reddit today (Jan. 23) to answer your questions on what it is like to experience a simulated trip to the Red Planet.
22 January 2014, 12:11 PM ET
To see the quick movement of the moon, observers need a set of bright markers across the sky, exactly the kind of signposts in the night sky this week. Two bright stars and three bright planets mark the moon’s path across the sky.
22 January 2014, 11:02 AM ET
As SPACE.com contributor Elizabeth Howell's Mars mission in the Utah desert comes to a close, she reflects on the commitment it takes to 'live' on the Red Planet, from maneuvering in a spacesuit to simulating zero gravity surgery.
22 January 2014, 07:28 AM ET
The 58 proposals are double the usual number submitted during such instrument competitions, NASA officials said. The agency has begun reviewing the ideas and expects to choose the final science gear for the 2020 Mars rover in the next five months.
17 January 2014, 09:48 AM ET
NASA engineers test multi-lobed air bags to protect the Mars Pathfinder spacecraft.
16 January 2014, 05:21 PM ET
NASA's Mars rovers Spirit and Opportunity landed on the Red Planet 10 years ago and the space agency will celebrate with a live webcast event tonight at 10 p.m. EST. Here's how to watch live.
16 January 2014, 04:42 PM ET
As I revved the all-terrain vehicle up the steep hill, I could feel gravity and mud pushing me back from the crest. I leaned forward in my spacesuit and with my right thumb, pressed hard on the throttle.
16 January 2014, 07:34 AM ET
During an orientation walk around the Mars Desert Research Station in Utah on Jan. 5, our crew confronted a steep hill.
15 January 2014, 03:56 PM ET
Within days of our two-week stay at the Mars Desert Research Station, crew members already encountered minor medical problems – a sore back and a cold or flu among them.
14 January 2014, 03:25 PM ET
As I ascended the stairs to the second floor of Utah's Mars Desert Research Station, something struck me as strange: the lights were off and the crew was quiet at what was usually a busy time — 5 p.m.
14 January 2014, 12:01 PM ET
The Kasei Valles outflow channel system extends ~1865 miles (3000 km). ESA's Mars Express photographed the area in 2004. A 67-image mosaic was used to create this animation.
14 January 2014, 10:46 AM ET
During the crew handover at the Mars Desert Research Station (MDRS) Jan. 4, one person spoke of the "noise" of Earth fading away as the crew focuses on its activities. That's something my group, Crew 133, is just starting to learn about.
14 January 2014, 10:15 AM ET
Crew 133 is learning a number of new skills during its two-week stay at the Mars Desert Research Station, which is a Mars Society facility in Utah designed to simulate exploration on the Red Planet.
13 January 2014, 02:27 PM ET
Walk across the fall line, knees bent, back straight. Lean into your back foot. Remember not to go tumbling off the hill while inside the spacesuit.
11 January 2014, 02:17 PM ET
Comet Siding Spring (C/2013 A1) will shoot within 83,000 miles of the surface of the Red Planet (1/3 the distance between Earth and Moon). Mars will orbit into closest approach to the cometary cloud about 100 minutes later.
11 January 2014, 01:50 PM ET
A first-person look at a simulated spacewalk taken by a crewmember of a Utah mock Mars mission that seeks that aims to test out technologies and procedures that could help humanity colonize the Red Planet someday.
11 January 2014, 11:50 AM ET
See photos from a mock Mars mission in the Utah desert as seen by Crew 133 at the Mars Desert Research Station near Hanksville (Jan. 4 to 19, 2014).
09 January 2014, 05:37 PM ET
"Spirit and Opportunity: 10 Years Roving Across Mars" opened Thursday at the National Air and Space Museum in Washington, D.C. The exhibition features photos taken by Spirit and Opportunity, which landed on the Red Planet in January 2004.
09 January 2014, 04:22 PM ET
The 1-ton Curiosity rover and its tracks are visible in a new image, which was taken by the High Resolution Imaging Science Experiment (HiRISE) camera aboard NASA's Mars Reconnaissance Orbiter on Dec. 11, 2013 and just released today (Jan. 9).
08 January 2014, 04:42 PM ET
Shelf-stable foods and crops grown onsite form the menu of the crews at the Mars Desert Research Station in rural Utah.