a chimpanzee - 침팬지, linguistics - 언어학, evolutionary - 진화의, 점진적인, civilized - 문명화된, to mutate - 돌연변이를 일으키다, DNA - 디엔에이, an artefact - 공예품, to undergo - 겪다, complex - 복잡한, difficult, convey - 전달하다, to communicate, relates - 관련되다, civilization - 문명, trace - 추적하다, something left of something, remains - 남은 것, 나머지, existence - 존재, 실재, 현존,

How humans evolved language

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