Accidental Tools: A Difference In Our Ancestors And Monkeys — A set of brief essays that can provoke students with the “and then God said” discussion: Capuchin monkeys are tool users par excellence. They use tools to dig, to open fruit, and to smash rocks together. Whatever we say about this, it is striking that the flakes made by the capuchins, but left unused by them, are identical to those made, we believe intentionally, by our ancient hominin ancestors. Perhaps we made them by accident at first, too. But then what happened?