I've found these more interesting since reading The Mysterious, Deep-Dwelling Microbes That Sculpt Our Planet in the nyt. You don't get that kind of thing on as

I've found these more interesting since reading The Mysterious, Deep-Dwelling Microbes That Sculpt Our Planet in the nyt. You don't get that kind of thing on asteroids or Venus, they are mostly produced as a side effect of microbes in the earth's crust that predate most surface life. It's an interesting question if we'll find them and or simple life in the crust of Mars. Idelwords has some discussion of that https://idlewords.com/2023/1/why_not_mars.htm https://idlewords.com/2023/1/why_not_mars.htm I find it somewhat reassuring that even if we raze the plant through nuclear war or climate change, the crust microbes will be just fine and regenerate new surface life a while after. (nyt article https://www.nytimes.com/2024/06/24/magazine/earth-geomicrobiology-microbes.html https://www.nytimes.com/2024/06/24/magazine/earth-geomicrobi... or https://archive.ph/VgzKD https://archive.ph/VgzKD)