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Space is starting to look like the better mining operation
(arstechnica.com)
This is a most excellent place for technology news and articles.
I don't think it will take a millenia. Rocket science is making good progress towards astroid stuff.
I certainly hope your guess is better than mine.
Did you notice how time and time again science fiction was overly optimistic concerning developments in future transportation capabilities ?
I can say that I'm very happy that we don't have flying cars. That would be a nightmare.