DIR v1.0
   DIR v1.0a
   DIR v1.0b
   DIR v1.0c
   DIR v1.1
   DIR v1.2
   DIR v1.2.1
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       "The universe is probably littered with the one-planet graves of
        cultures which made the sensible economic decision that there's
        no good reason to go into space--each discovered, studied, and
        remembered by the ones who made the irrational decision."
                                                     -- Randall Munroe