:::It's serious in a way, for the people who make it. They obviously put some work into maps and things. But is it serious in the way that we can call it part of the mainstream (or even a source for well known minority theories)? That's what we need on WP. So putting aside your personal opinion, can you show a reference (outside of Wikipedia or Eupedia) which treats eupedia as a reliable source in a relevant field? Eupedia is obviously a place where people write up their personal speculations. But what is the reputation of those speculations amongst people who know that field? You'll need to find evidence of a reputation for fact checking. Personally I'd say Eupedia is for a type of work which does not fit on Wikipedia. They have different aims. Wikipedia aims to summarize the mainstream on subjects. Eupedia is for original thinking.    

 Also see discussion at Talk:Genetic history of Europe