[quote=@Etcetera]
<Snipped quote by Mammalia>

Both. I don't think the concept itself is all that new, but there are almost no groups or individuals widely known who have a great deal of information about them. Interestingly, some ancient cultures seem to have some semblance of a knowledge of their existence.
[/quote]

-Spectre- I wonder what sort of information the Encyclopedia of Existence has on the subject. It's a recent thing, too.