hmmmm.....I don't think it's kosher to mix bones of a 60,000 yr old skeleton found in Israel, with 70,000yr old bones found in France.
As long as they're honest about what they're doing (no "Look at this 100% complete and intact skeleton we found!"), then I don't see a problem with trying to put disparate pieces into a bigger picture. We can all exercise some common sense and realize the limits of such an exercise - off by a few millimeters here or there, maybe one of the specimens is unusual in a way we can't yet recognize, and so forth - but it's still interesting to see something similar to what we might see if we really did find a 100% complete and intact skeleton.
"Don't mix the milch and the fleisch" -- that's not kosher.
OK, smart ass-ing aside. I'd have to wonder about the specimens originating from different "tribes". Add in caloric intake and disease over the generations, the body can change a lot in 10,000 yrs.