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Sand Dunes on Mars Can Change Faster Than Thought

Dunes in the north of Mars are not frozen in time as some have thought — conversely, their sands can shift both slowly and quickly, scientists have found. Full story

Young Mars crater contains water ice, photo shows

A fresh crater on Mars has revealed a hidden cache of frozen water in some of the latest photos from a powerful NASA spacecraft. Full story

Strange Mars photo includes ‘tree’ illusion

Naturally erupting dust clouds on Mars are creating structures that look surprisingly like trees near the planet's north pole. But don't be fooled — it's just an optical illusion, NASA scientists say. Full story

Mystery sand ripples on Mars explained

The nature of strange ripples of sand on the Martian surface is clearer now thanks to pole-to-pole images returned by a NASA spacecraft. But even with this new information, scientists still are unsure just how the features, which are unlike anything on Earth, came to be. Full story

Mars rover targets monster crater

NASA's Opportunity rover has studied several craters during its four years on Mars, but now it's going after the biggest crater yet. Full story

Radio glitch stalls Mars lander’s work

The Phoenix Mars Lander mission has hit its first snag: The radio on an orbiter that communicates with the lander has shut itself off due to an unknown problem. Despite this setback, Phoenix seems to be doing just fine. Full story

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Probe snaps close-ups of Martian moon

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Related Photos

Credit: NASA/JPL/University of Arizona The four candidate Mars Science Laboratory landing sites have been completely covered by HiRISE, in stereo. However, the color coverage is only the center 20 percent of each full HiRISE observation.This observation was acquired in color only, to extend the co

Fading ice
Fading ice

Ice exposed in two crater bottoms fades from view over the course of the martian summer in this series of HiRISE images taken in late-2008/early-2009. Sublimation of the ice leaves behind a dust layer that gradually thickens to the point where it obscures the ice. Each panel is 75m across.