The ten most unbelievable alien races in science fiction

Charlie Jane Anders, news editor for io9, compiled a list of the ten most unbelievable alien races in science fiction. Entries come from comic books, movies and television, and this one from the fiction shelves:Pierson's Puppeteers, from Larry Niven's Known Space books

These aliens get points for originality and not simply being humanoid. As Tim Morris explains, "Its biology is singularly