What's that sound? A "Marsquake" heard by NASA
2 October 2019; AFP: NASA on Tuesday released two audio clips of seismic activity on Mars after an "exquisitely sensitive" detector was set down on the planet's surface late last year.
The quakes, far too quiet to be picked up by the human ear, were recorded by the Seismic Experiment for Interior Structure (SEIS) in May and July.
Scientists hope that studying how seismic waves move through the planet's interior will reveal the deep inner structure of Mars for the first time.
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