Moontanman Posted December 2, 2022 Report Share Posted December 2, 2022 In the distant past our Sun was much dimmer than it is today, the science on this is pretty much confirmed, Faint sun paradox , during this time the Earth is thought to have had a large amounts of CO2 and Methane in its atmosphere to allow the Earth to have liquid water on its surface. On the other hand Mars is considered by many as too small to have had such an extensive atmosphere. I am proposing that Mars was an ice world similar to Jupiter's Moon Callisto but much larger. Being an ice encased moon would allow for liquid water at the surface with a very thin atmosphere. As the magnetic field of Mars was lost the Solar Wind would have swept the atmosphere of Mars away and slowly stripped away the ice by photo desiccation of the ice shell of Mars. This would have resulted in the surface being eroded by water while the ice shell was intact and as the ice shell was eroded and swept away the surface of Mars would have become the dessicated surface we see but with evidence of water flowing as well. Much like water flowing beneath a glacier on earth but on a much larger scale. The would allow for the faint young sun and the evidence of liquid water on Mars. Quote Link to comment Share on other sites More sharing options...
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