Mars' Inca City, formally known as Angustus Labyrinthus, exhibits a linear, almost geometric network of ridges like the Inca ruins on Earth. It is part of a circular feature appro

"This new view of Inca City and its hidden arachnid residents was captured by Mars Express’s High Resolution Stereo Camera," the ESA reported. Their spacecraft grabbed images of "everything from wind-sculpted ridges and grooves to sinkholes on the flanks of colossal volcanoes to impact craters,

The European Space Agency (ESA) has announced that the 'spiders' spotted by the agency’s Mars orbiter are actually geological features. When sunlight mixes with carbon dioxide, it triggers the release of gases that fracture ice,

They may sound like science fiction, but Mars' strange 'spiders' are very real, emerging from the frozen ground each spring.

Instead, the Martian spiders are actually dark spots between 45 meters and one kilometer across, which have begun to appear as gas bursts free of the Martian surface in the springtime, bringing with it dark material from below the surface.

What look like little black spiders start swarming across the Red Planet’s south pole. Of course, these are not actual arachnids or any living creature. The odd objects, in a region of Mars called Inca City,

The European Space Agency’s Mars Express has snapped the telltale traces of ‘spiders’ scattered across the southern polar region of Mars. Rather than being actual spiders, these small, dark features form when spring sunshine falls on layers of carbon dioxide deposited over the dark winter months.