New research from the University of Oxford has sent shockwaves through the scientific community with its discovery that Mars once had vast underground rivers of molten rock. The study's findings suggest these 'magmatic channels' could have played a crucial role in making the Red Planet habitable, paving the way for a re-evaluation of what makes a planet suitable for life.
Scientists at Oxford painstakingly analysed data from NASA’s InSight Lander to better understand seismic waves generated by Martian quakes and meteorite impacts. Their research focused on an enigmatic boundary 24 kilometres below Mars' surface, which they found was likely caused by molten rock pooling deep underground and extending hundreds or even thousands of miles laterally.
Contrary to previous assumptions that volcanoes on Mars were fed by isolated magma chambers, the new evidence points towards a complex 'plumbing system' of interconnected magma. This would have allowed for the recycling of essential elements, vital for generating and sustaining an atmosphere and oceans – conditions necessary for life as we know it.
The study also suggests that an interconnected magma system could have played a role in regulating Mars' climate. While this process was previously thought exclusive to planets with plate tectonics, the Oxford research implies that other internal geological processes might contribute to climate regulation on rocky planets, potentially making them more habitable than initially thought.
The implications of this study are profound for astrobiology and our search for life beyond Earth. By showing that a planet like Mars could still possess the internal mechanisms to support potential habitability without plate tectonics, the findings have broadened the criteria for identifying promising exoplanets. This may lead to a re-evaluation of numerous celestial bodies in our galaxy.