Planetary Science
For the first time, scientists have charted large, interconnected river drainage systems on Mars, identifying 16 major ancient basins. This mapping offers fresh evidence that the planet once had an active hydrological cycle.
A key feature among these systems is Paraná Valles, a sprawling network of channels and valleys sculpted by flowing water billions of years ago. Its geomorphology strongly suggests that Mars once experienced rainfall and prolonged surface runoff, reinforcing theories of a wetter, more Earth-like past.
MCQ:
What makes Paraná Valles significant in Martian geology?
A. It shows evidence of current tectonic movement
B. It preserves strong markers of ancient liquid-water flow
C. It is the youngest canyon system on Mars
D. It formed entirely through wind erosion
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