Video: Kanzi now makes his tools, just as our ancestors may have made them, two-and-a-half million years ago -- by holding the rocks in both hands, to strike one against the other.
Video: Kanzi sada sam izrađuje oruđe, kao što su ga možda izrađivali naši preci prije dva i pol milijuna godina, držeći komade kamena objema rukama i udarajući ih jedan o drugi.