title: Twilight times: light and the circadian system.
authors.affiliation: Institute for Medical Psychology, Ludwig-Maximilian University, Munich, Germany. till@imp.med.uni-meunchen.de
authors.forename: T
authors.initials: T
authors.lastname: Roenneberg
authors.forename: R G
authors.initials: RG
authors.lastname: Foster
mesh_terms: D000818:Animals; D002696:Chlamydomonas; D002940:Circadian Rhythm / Q000502:physiology / Q000528:radiation effects*; D017753:Ecosystem; D008027:Light; D008322:Mammals; D051379:Mice; D008954:Models, Biological; D018462:Photobiology