The director of an investigation in Guinea to search for the origin of bipedalism explains that they seek "to know where and how the transformation of the apes that gradually left life in the trees took place."

The director of an investigation in Guinea to search for the origin of bipedalism explains that they seek "to know where and how the transformation of the apes that gradually left life in the trees took place."

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The definition of 'intelligence' is elusive but includes things like the use of tools to modify the environment or the use of language