A suite of instruments to analyze samples of Martian rocks and soil for chemistry relevant to life is being readied in Maryland for NASA's next Mars rover, Curiosity.
Light-colored mounds of a mineral deposited on a volcanic cone more than three billion years ago may preserve evidence of one of the most recent habitable microenvironments on Mars.
Images from NASA's Mars Reconnaissance Orbiter implicate that carbon-dioxide frost, rather than water, is causing fresh flows of sand on some of the planet's dune gullies.
NASA's Mars Reconnaissance Orbiter resumed observing Mars with its science instruments on Sept. 18, recovering from an unplanned reboot of its computer three days earlier.
NASA's Mars Reconnaissance Orbiter put itself into a precautionary standby mode after experiencing a spontaneous computer reboot on Sept. 15.
In preparation for NASA's next rover landing on the Red Planet, one Mars year away, an instrument studying the Martian atmosphere from orbit has begun a campaign.
The ground where NASA's Mars Exploration Rover Spirit became stuck last year holds evidence that water, perhaps as snow melt, trickled into the subsurface fairly recently and on a continuing basis.
During a long drive on Labor Day, NASA's Mars Exploration Rover Opportunity reached the estimated halfway point of its journey from Victoria Crater to Endeavour Crater.
A dark rock about the size of a toaster oven is visible in images NASA's Mars rover Opportunity took on Sept. 16. It may be a meteorite. The rover is going for a closer look.
A newly installed webcam is giving the public an opportunity to watch technicians assemble and test the next NASA Mars rover, one of the most technologically challenging interplanetary missions ever designed.
Tests underway in a JPL clean room will refine the precision of movements by a robotic arm that can reach more than 7 feet in front of NASA's Curiosity Mars rover.
The rover for NASA's Mars Science Laboratory mission, Curiosity, exercised its mobility system by driving over raised ramps in recent testing at JPL.
Data from NASA's Phoenix Mars Lander suggest liquid water has interacted with the Martian surface throughout the planet's history and into modern times.
Curiosity, the Mars Science Laboratory rover that will be on Mars two years from now, has been flexing the robotic arm that spacecraft workers at NASA's Jet Propulsion Laboratory attached to the rover body in August 2010.
NASA's activities in social networking media will be recognized Wednesday in New York, when the agency receives an award for its presence on the popular Web site Twitter.
Experiments prompted by a 2008 surprise from NASA's Phoenix Mars Lander suggest that soil examined by NASA's Viking Mars landers in 1976 may have contained carbon-based chemical building blocks of life.
The most powerful telescopic camera ever to orbit Mars reveals a fresh crater, an ice mound, climate-recording layers and many other views in 314 newly released observations.
NASA and the European Space Agency (ESA) have embarked on a joint program to explore Mars in the coming decades and selected the five science instruments for the first mission.
NASA's Mars Reconnaissance Orbiter has a new project manager: Phil Varghese, who has managed another veteran NASA Mars mission – the Mars Odyssey orbiter – since 2004.
NASA mission controllers have not heard from the Mars Exploration Rover Spirit since March 22, and the rover is facing its toughest challenge yet - trying to survive the harsh Martian winter.