Ehmann, B., van Schaik, C. P., Ashbury, A. M., Mörchen, J., Musdarlia, H., Atmoko, S. U., et al. (2021). Immature wild orangutans acquire relevant ecological knowledge through sex-specific attentional biases during social learning. PLoS Biology, 19: e3001173. doi:10.1371/journal.pbio.3001173.