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A comment on Inventory of CO2 available for terraforming Mars. Parent comment

Re:Inventory of CO2 available for terraforming Mars by ryanmercer on Monday July 30, 2018 @08:52PM (#17649676)
Some people have tossed the idea out, with science, that Mars was once tectonically active, see

https://www.space.com/9683-surface-mars-possibly-shaped-plat...

and

https://www.space.com/17087-mars-surface-marsquakes-plate-te...

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