But arachnophobes have nothing to fear, even if the Mars orbiter images appear to suggest ... a formation known as Inca City ...

As Mars’ polar ice caps warm up, sublimated CO 2 gas explodes out in tall geysers, forming spider-like formations in their ...

The north pole of Mars is slowly sinking under the weight of an ice cap that only formed within the past few million years. And, in the process, it's telling us something about what the planet's ...

"Hindsight is always 100 percent, but if they (the Mars Climate Orbiter and Mars Polar Lander) were a little less cheap, they would have been better," he said. Next year's launch of a Mars lander of ...

Like Earth, Mars has polar ice caps, volcanoes, canyons and deserts. This image was stitched together from a series of photos from the Viking Orbiter — one of the communications relay stations ...

Data from NASA's Mars Reconnaissance Orbiter, together with ground-based measurements from NASA Mars rovers Curiosity, Pathfinder and Opportunity, also helped make the case for ferrihydrite.