New research from the University of Tübingen demonstrates that nut-cracking can emerge in Sumatran (Pongo abelii) and Bornean (Pongo pygmaeus) orangutans through individual learning and certain types of non-copying social learning. Padana, a female orangutan at Leipzig Zoo, continued to use wooden hammers to crack nuts for some time after the end of the study. Image credit: Claudio Tennie. “Nut-cracking with hammer tools has been argued to be one...