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A comment on Elon Musk argues that putting a million people on Mars ensures humanity's future. Parent comment

Re:Elon Musk argues that putting a million people on Mars en... by jessaustin on Tuesday September 30, 2014 @12:22PM (#8389081)
My understanding is that Mars at this time has much less sedimentation than Earth has. It may have had more in the past, but was there ever the volume of organic material that Earth has had in e.g. the Gulf of Mexico or the Tethys Sea?
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