title: A question of scale.
authors.affiliation: Department of Biological Physics, Eötvös Loránd University, H-1117 Budapest, Pazmany P. Stny 1A, Hungary.
authors.forename: T
authors.initials: T
authors.lastname: Vicsek
mesh_terms: D000818:Animals; D001519:Behavior; D001669:Biochemical Phenomena; D001686:Biological Phenomena; D006801:Humans; D008962:Models, Theoretical; D019368:Nature; D013598:Systems Theory