Mutants?

*that's probably answer in and of itself, but...*

Ah, perhaps I should explain. Some people who've arrived here have been of species that aren't remotely human. A good friend of mine knew a young girl here who was apparently a cat in her own world, for example. Many such people find themselves disoriented, if not outright distressed, upon arrival here because of changes, so I felt it was prudent to mention the matter up front.