title: The compass within.
authors.forename: Davide
authors.initials: D
authors.lastname: Castelvecchi
mesh_terms: D025041:Animal Migration / Q000502:physiology; D000818:Animals; D001522:Behavior, Animal / Q000502:physiology*; D001717:Birds / Q000502:physiology; D005399:Fishes / Q000502:physiology; D060526:Magnetic Fields; D012677:Sensation