I keep seeing people make this wild assumption that we're going to somehow terraform Mars and make it habitable. If Earth becomes so uninhabitable that we liter

I keep seeing people make this wild assumption that we're going to somehow terraform Mars and make it habitable. If Earth becomes so uninhabitable that we literally need to find another planet to live in, the question I'd ask is, "why couldn't we save an already perfect planet where we and everything we rely upon evolved?". At what point does earth become so fucked up that we look at Mars and think "Hmm, that looks like an option"