This network of long grooves and scratches forms part of a giant fault system on Mars known as Tantalus Fossae, and is shown here as seen by ESA’s Mars Express. At first glance, these features look as if someone has raked their fingernails across the surface of the Red Planet, gouging out lengthy trenches as they did so.
Click here for original story, Image: Tantalus Fossae on Mars
Source: Phys.org