Water could work as a buffer, but so could a rock, and this circles back to GGP's original point.
Similar reasoning (with perhaps higher focus on radiation than ∆T) applies to Mars, and is probably one of the side reasons Musk started The Boring Company.
Similar reasoning (with perhaps higher focus on radiation than ∆T) applies to Mars, and is probably one of the side reasons Musk started The Boring Company.