Researchers using NASA's Mars Reconnaissance Orbiter see seasonal changes on far-northern Martian sand dunes caused by warming of a winter blanket of frozen carbon dioxide. >>

A NASA spacecraft is providing new evidence of a wet underground environment on Mars that adds to an increasingly complex picture of the Red Planet's early evolution. >>

Taking a picture of Curiosity while it was on a hair-raising ride to the surface was no easy feat. Find out how they did it! >>

Fall and winter temperatures bring changes to Mars as the carbon dioxide atmosphere turns to dry ice frost that clings to the surface. The Mars Reconnaissance Orbiter used its powerful cameras and spectrometers to capture detailed pictures and measurements of wintry scenes of nature's beauty at work on the Red Planet. >>

Pictures from NASA's Mars Reconnaissance Orbiter show scars on the surface of the Red Planet where discarded pieces of the Mars Science Laboratory spacecraft hit the ground. >>

Building on the success of Curiosity's Red Planet landing, NASA has announced plans for a robust multi-year Mars program, including a new robotic science rover set to launch in 2020. Read More >>Watch archived webcast >>

Animation of a skinny "dust devil" on the dust-covered Amazonis Planitia region of northern Mars. >>

Mars Reconnaissance Orbiter Catches a Twister in Action. >>

The Red Planet -- or is it? This video answers one of the most frequently asked questions about our planetary neighbor. >>

Mysterious features on slopes hint there could be water flows on Mars. >>

How meteorites uncovered a Martian secret. >>

View the simulated views and computer generated images of where Mars Reconnaissance Orbiter is now. >>

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"Eyes on the Solar System" is a 3-D environment full of real NASA mission data. Explore the cosmos, including Mars from your computer. Fly with NASA's Voyager 2 spacecraft. See the entire solar system moving in real time. It's up to you. You control space and time. >>

See the latest mission images of our spacecraft and those returned from the Red Planet and get the latest updates on Curiosity's Journey! NASA Be A Martian >>

Mars has remained in the human imagination, and not even the rise of science and technology has interrupted our wary fascination with this neighboring world. >>

NASA and Microsoft Corp. of Redmond, Wash., have collaborated to create a Web site where Internet users can have fun while advancing their knowledge of Mars. >>

Or, how big is the Mars Science Laboratory rover? Ask Dr. C, your personal Mars expert! >>