article_snippet.sent: Much of it, Scientists say, involved cavemen grunting, or hunter-gatherers mumbling and pointing, before learning to speak in a detailed way.
article_snippet.sent: But in a new study, one linguist argues that human language developed rapidly with people quickly using complex sentences that sound like our own.
article_snippet.sent: Much of it, Scientists believe, still involved cavemen grunting, or hunter-gatherers mumbling and pointing, before learning to speak in a detailed way . '
article_snippet.sent: Most scholars believe that humans first started using a 'proto-language', which was a primitive kind of communication with only a gradual development of words and syntax.
article_snippet.sent: In a new study, one linguist argues that human language likely developed rapidly with people quickly using complex sentences that sound like our own.
article_snippet.sent: Professor Miyagawa says humans combined an 'expressive' layer of language, as seen in birdsong, with a 'lexical' layer, as seen in monkeys who utter isolated sounds, such as alarm calls.
article_snippet.sent: The 'integration hypothesis' suggests that whatever first caused humans, these layers of language blended rapidly.
article_snippet.sent: The international study found stone tool-making drove the evolution of language among our human ancestors in the African savannah.
article_snippet.sent: The international study suggests communication among our earliest ancestors may have been more complex than previously thought, and that tool-making helped drive evolution.
highlights_snippet.sent: Professor Shigeru Miyagawa believes humans combined an 'expressive' layer of language, as seen in birdsong, with a 'lexical' layer, as seen in monkeys .