Russell David Gray is a New Zealand evolutionary biologist and psychologist working on applying quantitative methods to the study of cultural evolution and human prehistory. In 2020, he became a co-director of the Max Planck Institute for Evolutionary Anthropology in Leipzig. Although originally trained in biology and psychology, Gray has become well known for his studies on the evolution of the Indo-European and Austronesian language families using computational phylogenetic methods. Gray also performs research on animal cognition. One of his main research-projects studies the use of tools among New Caledonian crows. Source: Wikipedia (en)