Scientists at the University of Oxford have identified evidence of magma rivers flowing beneath Mars’s crust, according to findings published in Nature Astronomy. The research team analyzed seismic data collected by NASA’s Insight Lander, which detected vibrations from meteorite impacts and Martian earthquakes to study an unusual boundary located approximately 15 miles below the planet’s surface.
The seismic analysis indicates that the most probable explanation for this subsurface boundary is the presence of molten rock accumulating in underground reservoirs and extending horizontally for hundreds or potentially thousands of miles. This discovery challenges previous scientific understanding, which had characterized Martian volcanoes as being supported by isolated magma chambers rather than an integrated system.
The implications of this interconnected magma system are significant for understanding Mars’s potential habitability. Such a configuration would have enabled the development of a chemically diverse crust capable of recycling elements and supporting the geochemical processes necessary for the creation of an atmosphere and ocean. The subsurface magma circulation could also have functioned as a climate regulation mechanism, a capability previously believed to require plate tectonics to achieve.
These findings broaden the scientific perspective on planetary habitability. Rocky planets that lack plate tectonics have generally been considered less likely to support life, but this research suggests such worlds warrant reconsideration as potential candidates for past habitability, expanding the universe of planets that scientists should examine in their search for evidence of extraterrestrial life.
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