Some of the Australian Aboriginies have brow ridges that are more 'severe' that the Neanderthals, yet we call them moderns but, not so Neanderthals.
I think Wolpoff, Sharpe and Hu (the Multiregionalist) have it correct, we are all one with regional differences
Journey Of Mankind (Modern Humans)
I know of no modern humans with the bone density of Neanderthals. Look at some of their femur bones in cross section.
Easily.
Nikolai Valuev
Blam — you are correct about the one species. If Cro-magnon and Neanderthal could produce fertile offspring, then biologically they are the same species.