Mars Express reveals shimmering dune field in ancient crater

The European Space Agency's Mars Express orbiter has captured new images of what appear to be metallic waves rippling across the floor of Kaiser Crater, an ancient impact basin in Mars's southern highlands. According to Space, the surreal scene is actually a field of dark sand dunes dusted with seasonal frost, much of it carbon dioxide or dry ice. The images challenge the common view of Mars as a uniform red desert, instead revealing a landscape of shifting textures and frozen volatiles.

IFLScience reported that the dunes rise to heights of around 100 meters and form part of a complex system within the crater. The same outlet noted that the region features "dunes in the craters within craters" and hinted that there may be signs of past water activity nearby. Meridia described the sight as a swath of "metallic-looking waves" sculpted by wind over millennia.

2 sources

MeridiaMetallic waves on ancient MarsIFLScienceMars Express Transmits Gorgeous Images Of 100-Meter "Metallic" Waves In Mars's Southern Highlands

"The surreal landscape challenges the common perception of Mars as a monotonous red desert."

Space's observation underscores how each new orbiter pass reveals unexpected beauty and complexity on the Martian surface. The dark sand contrasts sharply with the lighter frost, creating an almost liquid metallic sheen that has captivated both scientists and the public.

"Mars isn't all craters and craters within craters. There are dunes in the craters within craters, too. And maybe signs of water."

IFLScience's comment points to the layered geological history preserved in such features. While the dunes themselves are dry, the possibility of ancient water in the region makes Kaiser Crater a target for further study, as scientists piece together Mars's wetter past from orbit.