Note: The user query references "Xebara Cave," a common typographic variant for Kebara Cave (Me’arat Kebbara\text{\textit{Me'arat Kebbara}}) on Mount Carmel, Israel. This site houses the definitive anatomical evidence regarding the long-debated question of Neanderthal linguistic and vocal capabilities. For over a century, linguists and evolutionary biologists asserted that even if Neanderthals possessed complex brains, they were anatomically incapable of spoken language. Computer simulations based on skull b