We don't have any direct knowledge of a language. The shape of the bottom of the skull suggestod o meanderin argry and have a a speech thas. An extremely controversial idea. So i think t the neandertall disappearances is really hard to hard to account fore.
In a few decades, a torrent of new evidence and ideas about human evolution has allowed scientists to piece together a more detailed understanding of what went on thousands and even millions of years ago. Lesley Newson and Peter Richerson, a husband-and-wife team based at the University of California, Davis, have spent years together and individually researching and collaborating with scholars from a wide range of disciplines to produce a deep history of humankind. In A Story of Us, they present this rich narrative and explain how the evolution of our genes relates to the evolution of our cultures.