Scientists Puzzled by Sudden, Super-Loud Rumble Inside Mars
Shook the World In May last year, NASA's Insight Mars lander detected a powerful seismic tremor reverberating just below the planet's surface. At a monstrous magnitude 4.7, it is the most powerful ever detected on the Red Planet, and indeed anywhere off world. Ever since, the puzzling "marsquake" has had scientists scrambling for an explanation. […]