Pathfinder on Mars



A panoramic view of Pathfinder's Ares Vallis landing site, featured on the cover of the Dec. 5 issue of Science, reveals traces of this warmer, wetter past, showing a floodplain covered with a variety of rock types, boulders, rounded and semi-rounded cobbles and pebbles. These rocks and pebbles are thought to have been swept down and deposited by floods which occurred early in Mars' evolution in the Ares and Tiu regions near the Pathfinder landing site.

Source: Courtesy NASA/JPL-Caltech.

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