New analysis of seismic data from NASA's InSight lander suggests that Mars may have once harbored deep oceans of magma within its crust. The findings, reported by Space.com, point to a molten past that could have influenced the planet's potential to support life.
The study relies on marsquake measurements collected by InSight's seismometer, which detected wave patterns consistent with large reservoirs of molten rock beneath the surface. Researchers interpret these signals as evidence of magma seas that once sloshed within the Martian interior.
InSight operated on Mars from November 2018 until December 2022, recording seismic activity that has since been reanalyzed. The magma oceans are thought to have existed early in the planet's history, potentially driving volcanic activity and atmospheric changes.
Such molten layers may have released heat and gases, fostering a warmer climate and a thicker atmosphere—conditions considered essential for habitability. The findings challenge assumptions that Mars was always a cold, dry world.
The results remain preliminary, as InSight's data covers only a limited region near the Elysium Planitia landing site. Broader confirmation would require future missions with more extensive seismic networks.