• A multicolor map showing two circular craters on Mars.
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    Alluvial fans in craters on Mars—outlined in yellow—provide important clues about the evolution of the past climate of Mars. Lower crater is ~40 miles across near 24°S, 28°E. MOLA topography—red is high, purple is low—over THEMIS. Inset, ~3 miles across, shows an alluvial fan in Death Valley, CA.

  • A multicolor map showing two circular craters on Mars.

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Image credit: Google Earth; HEMIS image credit: NASA/JPL/ASU; MOLA image credit: NASA/JPL/GSFC

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