The sun has emitted many coronal mass ejections in the week leading up to Oct. 31, 2013, which merged together over time to pass Mars.
Scientists from NASA and the Planetary Science Institute in Tucson, Ariz., have identified what could be a supervolcano on Mars—the first discovery of its kind.
Lessons from underground nuclear tests and explosive volcanoes may hold the answer to how a category of unusual impact craters formed on Mars.
There is a surprising amount of water bound up in the soil of Mars, according to an analysis done onboard the US space agency's (Nasa) Curiosity rover.
NASA's Curiosity rover is revealing a great deal about Mars, from long-ago processes in its interior to the current interaction between the Martian surface
This colorful scene is situated in the Noctis Labyrinthus region of Mars, perched high on the Tharsis rise in the upper reaches of the Valles Marineris canyon system.
NASA's Mars rover Curiosity now has a view of a patch of exposed bedrock scientists selected for a few days of close-up study
The larger of the two moons of Mars, Phobos, passes directly in front of the other, Deimos, in a new series of sky-watching images from NASA's Mars rover Curiosity.
NASA's Mars rover Opportunity is studying the area of contact between a rock layer formed in acidic wet conditions long ago and an even older one
An image from NASA's Mars Reconnaissance Orbiter released today shows NASA's Curiosity Mars rover and the wheel tracks from its landing site
Researchers at the California Institute of Technology (Caltech) have discovered evidence for an ancient delta on Mars
This image is a scaled-down version of a full-circle view which combined nearly 900 images taken by NASA's Curiosity Mars rover.
Researchers from the University of Hawaii at Manoa NASA Astrobiology Institute (UHNAI) have discovered high concentrations of boron in a Martian meteorite
NASA research indicates hunks of frozen carbon dioxide -- dry ice -- may glide down some Martian sand dunes
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