There are several theories about the origins of human language: 1) Onomatopoeic theories propose that early sounds imitated environmental noises like animal calls. 2) Instinctive sound theories suggest language emerged from instinctive noises people made. 3) Symbolism theories postulate language developed from reacting to one's surroundings. 4) Physical need theories claim communal grunts from tasks evolved into chants. 5) Romantic theories argue language originated from the romantic aspects of human life. Scientific approaches study language formation through glossogenetics and paleontological evidence. Comparisons of ancient human fossils show physiological capacity for speech in early humans.

3. Casts of the nasal, oral and pharyngeal air passages of New born baby An adult chimpanzee A Neanderthal reconstruction An adult man

4. Nasal cavity pharynx Vocal folds epiglottis Soft palate tongue Oral cavity Nasal cavity Vocal folds epiglottis Soft palate tongue Oral cavity