Yes, I think his research focuses on a more recent period, and one of the main points of the book is to refute theories about why Neanderthals became extinct, s

Yes, I think his research focuses on a more recent period, and one of the main points of the book is to refute theories about why Neanderthals became extinct, so the 250kya period wouldn't be directly relevant to that. It's interesting that according to https://www.livescience.com/archaeology/humans-and-neanderthals-mated-250000-years-ago-much-earlier-than-thought https://www.livescience.com/archaeology/humans-and-neanderth... "This group of humans died out".