title: Why are some animals so smart?
authors.affiliation: Anthropological Institute and Museum, University of Zurich, Switzerland.
authors.forename: Carel
authors.initials: C
authors.lastname: Van Schaik
mesh_terms: D000818:Animals; D001522:Behavior, Animal; D005075:Biological Evolution; D003071:Cognition; D003213:Conditioning, Psychological; D003469:Culture; D004777:Environment; D004864:Equipment and Supplies; D007214:Indonesia; D007360:Intelligence; D007858:Learning; D011148:Pongo pygmaeus / Q000502:physiology*; D012919:Social Behavior