View Full Version : Evidence of Dry Lake Beds on Mars

2009-Sep-15, 06:20 PM
Networks of giant polygonal troughs found in crater basins on Mars are cracks caused by evaporating lakes. These landforms had been attributed to thermal contractions in the Martian permafrost, similar to what the Phoenix lander explored near the north pole on the Red Planet. But these polygon-shaped cracks are too large to be [...]

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