Seismic evidence points to subsurface magma seas
Analysis of seismic waves recorded by NASA's InSight mission since its touchdown on Mars indicates the presence of large-scale liquid magma layers within the planet's crust. These layers likely formed extensive oceans of molten rock that spread across significant portions of the Martian interior.
Implications for planetary evolution
Such magma oceans would have profoundly affected Mars' thermal history. Continuous heat release could have kept the surface warm for longer periods, creating conditions that might have allowed liquid water to exist at the surface.
Comparison with Earth processes
While Earth experiences similar magma reservoirs through plate tectonics and volcanism, the scale inferred for Mars appears unprecedented. Mars' crust is considerably thinner than Earth's, making the existence of planet‑wide magma oceans especially noteworthy.
Future research directions
Scientists aim to refine the existing dataset and equip upcoming missions with more advanced seismometers to map the Martian crust in greater detail. Understanding these magma reservoirs is key to assessing the planet's past habitability.