At https://phys.org/print461827831.html … scientists from Australia and China and the US have published a study in the journal Nature (19th November 2018) which purports to show humans with the ability to make stone tools in the Levallois fashion go back to 170,000 years (at least) in East Asia. This is of course contrary to the Out of Africa theory where Levallois technology only reached that part of the world around 50,000 years ago. Is this another nail in the coffin of the multi culti propaganda masquerading as serious science? In Europe and western Asia, and in Africa, levellois technology goes back 300,000 years – deep into the past. The levellois technique, from a type site in a Paris suburb, is an improvement on the older stone tool practise of hitting two lumps of stone together to achieve a hand axe. First a stone core is prepared (presumably in the same way as a hand axe) and when it is the right shape knappers can produce flakes for cutting and scraping tasks. The idea is that stone technology improved over time – an evolution of technology. All we know for sure is that levellois methodology was alive and kicking in almost every region of the world hundreds of thousands of years ago.
… and there are still multiple caves yet to explore (in the same general area of China).