Grand Canyon-size ‘scar’ on Mars revealed like never before in striking new satellite photos

A satellite orbiting Mars has captured the best-ever images of a gigantic “scar” carved across the Red Planet’s surface. The dark ravine, which is accompanied by unusual zebra-like stripes, is likely the result of extreme volcanic activity millions of years ago. 

The striking surface feature, named Aganippe Fossa, is a graben — a “ditch-like groove with steep walls on either side,” according to the European Space Agency (ESA). Astronomers first spotted it as early as 1930 but only officially named it in 1976, according to the U.S. Geological Survey.

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