What geological features scar the Martian landscape as signatures of ancient fluvial processes?
Answer
Ancient stream beds, deltas, and channel networks
The surface of Mars bears numerous scars interpreted by geologists as evidence of flowing water from billions of years ago. These features, which mirror terrestrial formations undeniably carved by liquid water, include ancient stream beds, deltas where water slowed and deposited material, and extensive channel networks that mark the path water took across the surface. The presence of these fluvial features strongly supports the hypothesis that Mars once maintained a warm, wet environment capable of sustaining stable, planet-wide liquid water systems, contrasting sharply with its current arid state.
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