NASA's MAVEN mission is investigating the mystery of how ancient Mars went from being a wet world to the cold, dry desert it is now. The MAVEN (short for Mars Atmosphere and Volatile Evolution) probe will investigate the Red Planet's thin atmosphere, searching for signs of how the planet became what it is today. See the latest MAVEN news, photos and video here.
A bombardment of asteroids on a once-icy ancient Mars may have created vast oceans of liquid water, which persisted for 200 million years.
This eerie portrait of Mars' moon Phobos in ultraviolet light was snapped by the NASA orbiter MAVEN as their orbits crossed paths.
Bruce Jakosky, principle investigator for MAVEN, spoke with Space.com about new findings that the sun stripped away much of Mars' atmosphere.
Most of the carbon dioxide from Mars' formerly thick atmosphere was lost to space billions of years ago, meaning the greenhouse gas cannot be accessed to help warm the planet up again.
The first astronauts to set foot on Mars may be in for a spectacular sight — the entire night sky filled with glowing auroras.
A Martian atmosphere thick enough to allow constantly flowing water may have been lost to space rather than trapped by surface rocks, according to a recent study.
The Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft arrived in orbit around the Red Planet on Sept. 21, 2014, 10 months after blasting off from Florida's Cape Canaveral Air Force Station.
Observations by NASA's MAVEN Mars orbiter suggest that shooting stars lit up the Red Planet's skies after the close flyby of Comet Siding Spring this past October.
NASA's newest Mars probe recently made a risky dive into the Red Planet's upper atmosphere to learn more about how the planet's climate changed over time.
NASA's MAVEN spacecraft spotted ultraviolet "Christmas light" auroras dancing in the Red Planet's atmosphere for five days leading up to Dec. 25, 2014.
A NASA spacecraft that recently arrived in orbit around Mars is already helping to solve a Martian mystery. See how NASA's MAVEN spacecraft is revealing new secrets of the Red Planet.