title: [Gaia, light and the biosphere].
abstract: Some aspects of life are tightly bound to light exposure. Photosynthesis, chronobiology and various manifestations of the socio-cultural behaviour are typical examples.
authors.affiliation: CHU du Sart Tilman, Service de Dermatopathologie, Liège.
authors.forename: J F
authors.initials: JF
authors.lastname: Hermanns
authors.forename: T
authors.initials: T
authors.lastname: Hermanns-Lê
authors.forename: G E
authors.initials: GE
authors.lastname: Piérard
mesh_terms: D001505:Beauty Culture; D002909:Chronobiology Phenomena; D018534:Earth, Planet; D006801:Humans; D010788:Photosynthesis; D012878:Skin Neoplasms / Q000209:etiology; D013472:Sunlight / Q000009:adverse effects