Lobato, M.; Vellema, M.; Gahr, C.; Leitao, A.; de Lima, S.; Geberzahn, N.; Gahr, M.: Mismatch in sexual dimorphism of developing song and song control system in blue-capped cordon-bleus, a songbird species with singing females and males. Frontiers in Ecology and Evolution 3, 117 (2015)
Scientists studying a rare population of tool-using chimpanzees have found that aging can have a profound impact on their abilities—but not all chimps decline equally.