Human Subspecies: Okay, no, since there are no humans. (Or, at least, none worth speaking of.) However, once the genetic engineers really got working, there are literally thousands of eldrae subspecies, galari subspecies, myneni subspecies, kaeth subspecies, esseli subspecies – although, with the esseli, it’s proceeded almost to the point that each individual is his very own species – and so on and so forth. People adapted to space, to alien planets, to some social ideal, to live underwater, to stand up under high gravity, to photosynthesize, to reproduce parthenogenically, to fly with their own set of wings, to breathe different atmospheres, to dwell in solar coronas, to… well, it’s a really long list.