Recent research has indicated significant evidence of a massive subsurface ocean on Mars, suggesting the potential for microbial life today. Scientists Yuya Akamatsu and Ikuo Katayama used data from NASA's InSight lander to study seismic data and identified discrepancies in seismic wave velocities at depths indicative of water-filled rock cracks. This new model contradicts earlier theories that these discrepancies reflected solid rock transitions and instead points to large reservoirs of liquid water beneath the surface, reinforcing the idea that Mars may have been more hospitable than previously believed.
"Many studies suggest the presence of water on ancient Mars billions of years ago, but our model indicates the presence of liquid water on present-day Mars."
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