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Underground caves do exist on the Moon, radar observations confirm
(www.techspot.com)
This is a most excellent place for technology news and articles.
"It's a dream of Musk"
Guess you were born recently, because this stuff predates Musk even being born.
But you're so blinded by Musk living in your head rent free, you don't even bother to learn about the windmill at which you're tilting.
Luddites, using the very high tech they're trying to destroy...oh the irony.
We've already been there. We did it. Done. We quit doing it a looooong time ago. Why are we trying to go back now?