Why is it in news?
NASA’s InSight lander has picked up a gentle rumble at Mars, believed to be the first marsquake ever detected.
More in news
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Proof of seismic activity:(1) It is proof that Mars was still seismically active. Mars is not nearly as geologically active as Earth and, like our moon.(2) Mars lacks tectonic plates.
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Significance: It will help in understanding and learning more about how rocky planets are formed.
Source
The Hindu