In fact, these words are by no means meaning only a sign that the speaker is thinking, hesitant for something or agreeing and confirming an information.
In a recent study, US scientists identified the FOXP2 gene mutation as a cause for human speech.
The human language represents a blend of two different communication systems similar to the sounds of monkeys and birds' songs.
Scientists believe that expressive movements in primates are different from chewing motions and become the basis for language development. There are different theories that
Recently, an orangutan named Rocky is said to have learned how to emit vowels and almost simulates human language.
Recently, a geneticist and molecular biologist, Adriana Heguy, has studied the dog language and the complexities that make it impossible to understand human language.