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There is no intelligent life on the
world. It is free for exploitation.
Typical uses include colonization
(usually on the very best worlds),
industry (mostly on bad worlds),
hunting preserves (including prehis-
toric ones!), and research (the whole
timeline is set aside as a zoo, science
station, etc.). “Disaster worlds” are
sometimes exploitable, if only as
waste dumps; others are reserved for
scientific use.