Curiosity Rover Spots Clear Evidence of Ancient Water on Mars | Page 6 of 13

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‘Lineae’ slopes

The dark streaks between the rough and smooth parts of Mars could indicate seasonal water flow on Mars. — The dark streaks between the rough and smooth parts of Mars could indicate seasonal water flow on Mars. Image: NASA/JPL-Caltech/Univ. of Arizona

This processed image from the HiRISE Camera on the Mars Reconnaissance Orbiter shows lineae (line) slopes, which could indicate where ancient water once flowed off this large ridge. Each line is about the length of a football field!

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