Isn't it already common knowledge that Mars cant be terraformed? No magnetosphere, cold core too iirc (and thats related to the moons being tidally locked.
We are talking about a planet-scale engineering project; something that is millions of times the scale of anything that has been attempted.
We have only d 13 landing on it, and only something 70 space craft have travelled to Mars or beyond[1].
We have only just found traces of water there, and who knows what else is available (or not).
We have never even attempted to terraform anything, and the closest we've come has been maybe things like desert control programs.
And yet it is supposed to be common knowledge that "it can't be done"? Sure, that is likely to be true, but the idea that we already know the specific things that will stop us seems unlikely.
I love the idea of terraforming Mars, to the point of spending a lot of time understanding the challenges to achieving success.
Conceptually there is always tech which we are yet to discover, but that just pushes the conversation into hand wavy territory, and discussing the details is always more fun.
The simplest plans are to start a runaway green house effect, in order to warm the planet up.
That alone requires signficant but potentially achievable feats of engineering.
But as I remember, the unsolved issue remains in maintaining a stable atmosphere, one which isnt sheared away by solar wind.
This is why the tidal locking issue is the problem. The core is solid on Mars, and the idea of spinning up a planet to rotate puts us beyond space elevator tech and nearing solar engineering levels of ambition.
As someone else suggested, there's the idea of having a super conducting magnet on the equator to create the field.
That's still below solar engineering, but a feat of such magnitude that underground habs win out as an option for the foreseeable future.
Hear-say: although the magnetosphere is a problem, it's supposedly possible to out-pace it because the original atmosphere loss occurred over millions/billions of years.
We are talking about a planet-scale engineering project; something that is millions of times the scale of anything that has been attempted.
We have only d 13 landing on it, and only something 70 space craft have travelled to Mars or beyond[1].
We have only just found traces of water there, and who knows what else is available (or not).
We have never even attempted to terraform anything, and the closest we've come has been maybe things like desert control programs.
And yet it is supposed to be common knowledge that "it can't be done"? Sure, that is likely to be true, but the idea that we already know the specific things that will stop us seems unlikely.
[1] https://en.wikipedia.org/wiki/List_of_Solar_System_probes