Before the InSight Lander arrived on Mars, scientists could only estimate what the planet’s internal structure might be. Its size, mass, and moment of inertia were their main clues. Meteorites, orbiters, and in-situ sampling by rovers provided other clues. But when InSight (Interior Exploration using Seismic Investigations, Geodesy and Heat Transport) arrived on Mars in … Continue reading "Marsquakes are Caused by Shifting Magma"