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.
カンジが道具を作ろうとしています 我々の祖先と同じやり方かもしれません 250万年前のやり方 両手に石を持って 片方をもう一方にぶつけています