The sand dunes were imaged as part of a program to ... It comes as part of a series of pictures taken by the HiRise camera that orbits Mars on the Mars Reconnaissance Orbiter (MRO) spacecraft.

Black and white photos of nattily dressed men and improbable-looking flying machines against a background of sand dunes instantly evoke the Wright Brothers’ pioneering flights at Kitty Hawk.

One evening in 1908, a Namibian railway worker named Zacherias Lewala was shovelling railroad tracks clear of creeping sand dunes when he ... (See haunting pictures of abandoned villages in ...

"These are in sand-dune areas, so we don't know whether they will keep getting bigger or will disappear under moving sand." [Latest Photos from NASA's Mars Reconnaissance Orbiter] The spiders have ...