Where is the pharynx and how did it become an important part of human sound production
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Another speculation about the origins of human speech comes to the biological basis of the formation and develpment of human language.Physical features human possess,especially those that are distinct from other creatures,which may have been able to support speech production.For example at some early stage our ancestors made a very significan transition to an upright posture,with bi pedal locomotion(on two feet)and using other body parts.Some changes about it mentioned can be seen in the physical differences between the skull of a gorilla and that of Neanderthal man form 60000 years ago but its theory is uncertaainly.
The Natural sound source
Another speculation about the origins of language is based on natural sounds.