The origin of speech is one of the biggest unanswered questions in the evolution of mankind. Scientist from all over the world from different disciplines using different methodologies have been...Show moreThe origin of speech is one of the biggest unanswered questions in the evolution of mankind. Scientist from all over the world from different disciplines using different methodologies have been trying to solve the mystery that is the origin of speech. An unambiguous answer however, remains absent. Using the method of comparative morphology and microbiomechanical studies, it can be studied when in our evolutionary history the anatomy fit to support speech production first arose, and thus which species first had the ability to talk. This thesis looks at published data on different hard structures of the vocal tract, in particular the hyoid, hard palate and mandible, of Australopithecus afarensis, Homo erectus, the SH hominins and Homo neanderthalensis to compare them to those of the modern human and non-human great apes vocal tract, in order to discover what we can infer about the origin speech based on the evolution of the vocal tract. This comparison has shown that based on their features, these hominins can be divided into two categories. The first category is that of archaic morphology and is characterized by a hyoid, hard palate and mandible that most closely resembles the anatomical features of the non-human great apes, in particular, chimpanzees. This means they possessed a bullashaped hyoid body, a long and broad hard palate and a long and narrow, chinless mandible. To this group belong the Australopithecus afarensis and Homo erectus. The second category is that of modern morphology and is characterized by the hyoid, hard palate and mandible that most closely resembles the anatomical features of modern humans. This means a bar-like hyoid body, a shorter and more narrow hard palate and a short and broad mandible with a bony protuberance, the chin. To this groups belongs the SH hominins the Homo neanderthalensis. Based on the results, it can be concluded that the anatomical features of the vocal tract fit to support the production of speech were already in place with, at least, Neanderthals. Therefore, Neanderthals could speak. The way forward for future studies into the origin of speech mainly is more data, both in terms of quantity and more species, though this is not something that can be forced. Establishing the origin of speech might open up a new path into studying the origin of language, a related, but not identical topic.Show less