At https://phys.org/news/2021-02-neanderthals-homo-sapiens-identical-nubian… … Neanderthals and Modern Humans used identical Nubian stone technology we are told. Levallois flakes. Not only did they share a similar genome with Modern Humans [on the male side] but now it seems they were using the same techniques to manufacture stone tools. The dividing line is the Laschamp geomagnetic reversal event, it has been suggested. Were Neanderthals affected by increased radiation and mutate into modern humans? The research is published in Scientific Reports – see https://doi.org/10.1038/s41598-021-82257-6 … which may look like a boring comparison of flint flakes in separate occupation strata but it also involves a Neanderthal child [found in proximity to the Levallois flakes].