That's a philosophical and theological question. The Church's position regarding other beings, imaginary or real, is that we should not impose limits on what kinds of other creatures God may have created.
By the way, I am not an adherent of Archbishop Usher's chronologies so the 6,000 years business is a moot point. From a philosophical point of view, it doesn't really matter how old the earth or the universe are theoretically conjectured to be.
But, just for clarification, you can't get from fossils of Monkey Bones to atheistic materialism by the scientific method. Someone's emotional desire to overturn the Christian view of reality is not the same as being "scientific" in a strict sense. This is a bias that comes in. And, I argue that regarding liberal secular humanists who get really wacko and maniacal about Darwinism that sexual matters are at the basis of this. This can be observed in many forms. Now, why they go in maniacly for the Monkey Bones and the fantasy graphs,thinking that these give them some sort of edge here, only God knows. The whole episode in the cultural history of modern Western civilization is pretty strange, from Darwin and Thomas Huxley, to the Scopes Trial and the Johnny Weissmuller Tarzan movies.
Personally, I thought Christopher Lambert did a pretty good job in Greystoke - '80s neo-primitive chic - but that's purely an aesthetic observation. Ian Holm was pretty good in that as well.
When you have a scientific argument get back to us.
Otherwise, I for one am not interested in your sexual fantasies.