Alien Intelligent Speciescopyright Ó Joerg Rhiemeier
What elves, orcs and dragons are to fantasy, are intelligent (and non-intelligent) aliens to science fiction. Of course, there is lots of science fiction (even lots of excellent science fiction) which does not involve alien races, but many stories and campaigns do. However, if you are going to write or play science fiction, these aliens must of course respect scientific facts. One of these issues is which kinds of stars can have habitable worlds; this is addressed in Stars, Planets and Life. This file deals with the aliens themselves.
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