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A Snaking Scar Across Mars: The Mystery of Aganippe Fossa

A fascinating feature takes center stage in this new image from ESA’s Mars Express: a dark, uneven scar slicing through marbled ground at the foot of a giant volcano. This scar, known as Aganippe Fossa, is a patchy, roughly 600-km-long feature known as a ‘graben’: a ditch-like groove with steep w

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