Scientists have discovered that the closest human relatives, chimpanzees, cannot speak due to the fact that their analog of the speech gene, inherited from our species through a common ancestor, has evolved in a completely dissimilar way from humans.

So far, it has not been fully clarified exactly which genes are involved in speech, but it is believed that the FOXP2 gene plays a key role, since mutations and disorders in its operation in humans are generally accompanied by impaired verbal ability.

However, it has been determined that the human FOXP2, and monkeys are not only different in appearance, but also have distinct functions, causing various effects on the work of the same genes, which is why monkeys can not speak.

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