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Mar 7 at 10:46 comment added Vesper However, you are right in that life can take other forms that exist at higher temperature and pressure range(s), like those that are at Moho, but for me, developing methond to communicate with such a lifeform requires magic more complicated than handwaving that allows artificial cooking of planets; and you can't just handwave them in, you need to "psycho-wave" them in instead. This life would have to be completely alien to us somehow, and any interaction between us and them should be done away from the material plane.
Mar 7 at 10:42 comment added Vesper @Pica your examples only cover low temperature spectrum, while this is an example of overheating. Entropy above a certain temperature level causes chemistry to fail, above another would cause inter-atomic relations to fail (hello plasma), and yes, if life exists at those temperatures, it either was there before all the planet-cooking, or wasn't at all because it needs a lot of time to form. But Q states the settlers are "normal" aka live in our convenient temp/pressure conditions, so there would be no interation with high-temperature life, if any. (Rechecked, Q is not tagged science-based)
Mar 7 at 8:30 comment added Pica @Vesper And you underestimate the ressilience of life in general. Tardigrads that dry out and go to space. Fungi that eats radiactive decay. Lichen spores, that are sucked dry and dead, coming back to life. Life adapted to boiling oceans, alien chemistry of sulphur black smokers and that is what we know, what we see. The only reason we can not detect life at Moho is likely due to our preconception of what life has to look like. As in, when we bring it back up, its just a rock. Just because it kills us and what we see, doesn't mean the show doesn't go on.
Mar 7 at 7:41 comment added Vesper @Pica you miss what is cooking an entire planet. Imagine a say 500C heat source enveloping the planet and lasting several years, thus the outside equilibrium temperature on the surface reaches that value. Everything inside would be at that temp or higher, as the planet's core usually has a heat source of its own, and heat would propagate through the mantle to the upper core. So every nick and crevice would reach this temperature as there would be nowhere to dump excess energy. The normal biosphere depends on liquid water, and there would be none, so EXTERMINATUS would technically happen.
Mar 3 at 20:10 history edited Pica CC BY-SA 4.0
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Mar 1 at 23:30 comment added Robert Rapplean I won't argue that. My argument is that such life would have a hard time reproducing in the Venus-like or Mars-like conditions that might be left.
Mar 1 at 22:26 comment added Pica The power of statistics compels you, to accept, that there is always a survivor. A tardigrade from outer space, flung up rock, ricocheting back, hot smoker life returning to returning oceans. Life is easy to kill, but incredible hard to eradicate.
Mar 1 at 21:30 comment added Robert Rapplean Your belief about the resilience of a biosphere requires that the planet's surface maintains some resemblance to the original state during evolution. The microbes deep underground would survive, but they'd have nothing to return to, and evolution would be set back billions of years.
Mar 1 at 17:01 history answered Pica CC BY-SA 4.0