Beneath the ochre stillness of Mars, seismic data gathered by NASA's InSight lander has revealed something that quietly reshapes our understanding of planetary life: a vast, layered magmatic system buried 24 kilometers deep, stretching perhaps thousands of kilometers across the northern hemisphere. Researchers at Oxford and Bristol have found that Mars, long considered a geologically simple world frozen in place without the churning of tectonic plates, once harbored complex, interconnected systems of molten rock that separated, sank, and rose again through its entire crust. The discovery invit