Spiral troughs found on the surface of Mars are in situ ice-excavated canyons with a total volume 10 times that of the Grand Canyon, making them one of the largest and youngest geologic ...
Catherine Weitz, a senior scientist at the Planetary Science Institute in Tucson, Arizona, has reported new evidence for multiple, water-related geologic processes on Mars. She and her colleagues ...
View of a Mars polar trough, approximately 20 kilometers across and a few hundred meters deep. The image shows a mound (orange dot) and a depression (blue dot) that are concentrically layered. Some of ...
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