Re:What If We Haven’t Met Aliens yet Because They’ve Messed ...
by jedberg on Saturday August 03, 2019 @08:17PM
(#20603627)
> Actually, most planets don't have plate tectonics
I think that is speculation at best. Looking just at our local system, Mercury appears to have active tectonics, Venus is now believed to have active tectonics, Earth obviously does, and Mars is believed to have had them at one point if not currently. And there seems to be evidence of both tectonics and liquid water on Titan.
I think that is speculation at best. Looking just at our local system, Mercury appears to have active tectonics, Venus is now believed to have active tectonics, Earth obviously does, and Mars is believed to have had them at one point if not currently. And there seems to be evidence of both tectonics and liquid water on Titan.