Hot? yes, but apparently cooler than England right now as long as you're a meter below ground in a ring around the poles (how's a constant 21c/70f sound)
this guy's website is so weird but I love the novelty of the idea and he portrays a plausible scenario for it being ultimately more habitable than Mars
Why not Venus? Sulfuric acid sounds tasty
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Venus doesn't have this cool room temperature underground zone tho and you'd have to go through sulfuric acid atmosphere and there also aren't what seems to be a giant layer of ice covered in potential hydrocarbons
All that tells me is that we *have * o settle there. Humanity's arrogance compels us to settle in the most hostile places, even though nature doesn't want us there. It'd be the Pheonix Arizona of the solar system.
It might be more hospitable than Phoenix if you get the floating cities to work
"We choose to go to Mercury in this decade and do the other things. Not because they are eat, but because fuck God. Stick this rocket all the way up your divine ass. We're going to Mercury and we're going to live there!" -
It does have a nice warm upper atmosphere though, not room temperature but under 200f which is more manageable than mars i think lol