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Ok_Goal7960 t1_iwxw2f1 wrote

Reply to comment by MidnightPlatinum in Mars was once covered by 300-meter deep oceans, study shows by magenta_placenta

Mars somehow lost its magnetic field. Eventually the solar winds eroded Mars atmosphere away until it was no longer capable of supporting liquid water on the surface.

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Bensemus t1_iwyggg8 wrote

Not true. It’s due to Mars being tiny. Venus has basically no magnetic field while also being much closer to the Sun. It’s atmosphere melts lead.

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