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Mars’s surface is covered in all manner of scratches and scars. Its many marks include the fingernail scratches of Tantalus Fossae, the colossal canyon system of Valles Marineris, the oddly orderly ridges of Angustus Labyrinthus, and the fascinating features captured in today’s video release from Mars Express: the cat scratches of Nili Fossae.

Nili Fossae comprises parallel trenches hundreds of metres deep and several hundred kilometres long, stretching out along the eastern edge of a massive impact crater named Isidis Planitia.

This new video features observations from Mars Express's High Resolution Stereo Camera (HRSC). It first flies northwards towards and

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