A new study proposes that Mars once had a fully molten core, potentially explaining the planet’s hemispheric magnetic field asymmetry. The model links this anomaly to heat loss concentrated in the southern hemisphere, driven by differences in crustal thermal conductivity. The findings offer new insight into Mars’ early interior dynamics and atmospheric evolution.
Geologists from the University of Colorado Boulder report that extensive valley networks on Mars were likely formed by widespread precipitation, challenging previous theories that attributed their formation to runoff from melting ice caps. Using landscape evolution models and topographic data from NASA missions, the researchers found that valley head elevations across Mars’ southern highlands are more consistent with rain or snowmelt than with localized ice melting.
Scientists analyzing data from NASA’s Perseverance rover have discovered diverse volcanic rocks in Jezero Crater. The findings point to prolonged volcanic activity and possible past water interaction, raising new questions about Mars’ potential to support life.
New research published in Nature Communications suggests that Mars’ magnetic field, which may have helped retain the planet’s atmosphere and surface water, existed until approximately 3.9 billion years ago—lasting longer than prior estimates of 4.1 billion years. The updated timeline offers a clearer picture of Mars’ early environment, potentially shedding light on its habitability.
A new study published in Nature Astronomy combined orbital imagery with seismological data from NASA’s Mars InSight lander to derive a new impact rate for meteorite strikes on Mars.
