The transition from the Middle to Upper Paleolithic in Europe marks a pivotal period in human evolution, with the replacement of Neanderthals by anatomically modern humans. A new study by Nicolas Teyssandier, Director of Research at the French National Center for Scientific Research (CNRS) and vice director of the TRACES laboratory at the Toulouse Jean Jaurès University examines the archaeological evidence for this transition and attempts to reconcile it with recent discoveries, shedding new light on this complex period of cultural and biological change.