Oppenheimer says his DNA studies indicate that 50% of the Europeans can trace their origins to a guy in northern Pakistan about 45,000 years ago who made their way to Europe through Russia.
He says the other 50% (of Europeans) can trace their origins to an off-spring (a thousand years later) of the original guy and they made their way to Europe through the Middle-East.
Origins, Age, Spread And Ethnic Association Of European (DNA) Haplogroups And Subclades
(I just discovered this - Haven't studied it yet)
Probably ~ and so can the Chinese ~ but they’re not gonna’ eh!
The materials seems to be focused on the agricultural expansion thesis with no reference to refugia ~ so that places it at something like 9 or 10 years ago for the greater part of the writeup.
Doesn't mean it's wrong; just that we may already know more from other materials.