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Re:Nasa’s InSight Lander Captures Audio of First Likely ‘Qua... by nphard85 on Wednesday April 24, 2019 @09:38PM (#19744246)
The article states definitively that Mars does not have tectonic plates. This is news to me because hitherto I thought there is no evidence either way.
Re:Nasa’s InSight Lander Captures Audio of First Likely ‘Qua... by lawlessone on Thursday April 25, 2019 @05:32AM (#19746413)
Plate Tectonics seems to require water , lots of water.

http://adsabs.harvard.edu/abs/2001AGUFM.U21A..09S