Santino's stone-gathering however, is a clear case of planning for the future, he said, since the calm manner in which the chimpanzee collected the stones differed from the agitated state in which he later hurled them.
Santino's stone-gathering however, is a clear case of planning for the future, he said, since the calm manner in which the chimpanzee collected the stones differed from the agitated state in which he later hurled them.