Neanderthals made stone tools, and are associated with the Mousterian industry. The Mousterian is also associated with North African H. sapiens as early as 315,000 years ago and was found in Northern China about 47-37 thousand years ago. It evolved around 300,000 years ago with the Levallois technique which developed directly from the preceding Acheulean industry (invented by H. erectus about 1.8 mya). Levallois made it easier to control flake shape and size, and as a difficult-to-learn and unintuitive process, the Levallois technique may have been directly taught generation to generation rather than via purely observational learning. There are distinct regional variants of the Mousterian industry, such as: the Quina and La Ferrassie subtypes of the Charentian industry in southwestern France, Acheulean-tradition Mousterian subtypes A and B along the Atlantic and northwestern European coasts, the Micoquien industry of Central and Eastern Europe and the related Sibiryachikha variant in the Siberian Altai Mountains, the Denticulate Mousterian industry in Western Europe, the racloir industry around the Zagros Mountains, and the flake cleaver industry of Cantabria, Spain, and both sides of the Pyrenees. In the mid-20th century, French archaeologist François Bordes debated against American archaeologist Lewis Binford to explain this diversity (the Bordes-Binford debate), with Bordes arguing that these represent unique ethnic traditions and Binford that they were caused by varying environments (essentially, form vs. function). The latter sentiment would indicate a lower degree of inventiveness compared to modern humans, adapting the same tools to different environments rather than creating new technologies. A continuous sequence of occupation is well-documented in Grotte du Renne, France, where the lithic tradition can be divided into the Levallois-Charentian, Discoid-Denticulate (43.3±0.929-40.9±0.719 thousand years ago), Levallois Mousterian (40.2±1.5-38.4±1.3 thousand years ago), and Châtelperronian (40.93±0.393-33.67±0.450 thousand years ago).