Since comets are in the news, here's an old idea for virtuous recursion in future transport & industry: ice rockets http://szabo.best.vwh.net/comet.mining.html …
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@NickSzabo4 you are, by a stretch, the most interesting person on Twitter. Thanks for being so active.
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@NickSzabo4 come on, you know it :)Thanks. Twitter will use this to make your timeline better. UndoUndo
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