title: Animal cognition: Aesop's fable flies from fiction to fact.
abstract: A new study shows that rooks are able to spontaneously drop stones into a tube of water to obtain a floating worm. This sophisticated problem solving raises intriguing questions about the use of imagination in animals.
authors: Department of Psychology, University of Auckland, Auckland 1142, New Zealand.
authors: Alex H
authors: AH
authors: Taylor
authors: Russell D
authors: RD
authors: Gray
mesh_terms: D000818:Animals; D001522:Behavior, Animal; D003071:Cognition / Q000502:physiology*; D046368:Crows / Q000502:physiology*; D057079:Pongo / Q000502:physiology / Q000523:psychology; D011340:Problem Solving