It takes a long time to learn how to do that, and they excavated the area and they found that this material culture, this way of doing it, these rocks, had passed down for at least 4,300 years through 225 chimpanzee generations.
Potrebno je dugo vrijeme da bi se to naučilo, i prokopali su to područje i otkrili da se ta materijalna kultura, taj način rada, to kamenje, prenosilo barem 4300 godina kroz 225 generacija čimpanzi.