Rumbling 'Marsquakes' on the Red Planet are Mystifying and Exciting Scientists

NASA's InSight lander has its seismic instrument tucked under a shield to protect it from wind and extreme temperatures. (Credit: NASA/JPL-Caltech)NASA’s Mars InSight spacecraft landed on the Red Planet in November 2018. Scientists equipped the mission with a seismometer so they could learn how Mars releases seismic energy — that is, to get a feel for how the Red Planet rumbles. So far, InSight has recorded more than 100 seismic signals, and researchers are confident at least 21