english: 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.
non_english: Naučiť sa to zaberie kus času. Pri vykopávkach na tom území sa zistilo, že táto materiálna kultúra, toto otváranie orechov kameňmi, siaha 4300 rokov do minulosti. To je 225 generácií šimpanzov.