title: Palaeontology: a firm step from water to land.
authors.forename: Per Erik
authors.initials: PE
authors.lastname: Ahlberg
authors.forename: Jennifer A
authors.initials: JA
authors.lastname: Clack
mesh_terms: D000818:Animals; D005075:Biological Evolution; D004777:Environment; D005121:Extremities / Q000033:anatomy & histology / Q000502:physiology; D005399:Fishes / Q000033:anatomy & histology* / Q000145:classification / Q000502:physiology*; D005580:Fossils; D049690:History, Ancient; D010163:Paleontology; D010802:Phylogeny; D013997:Time Factors; D014867:Water
chemical_list: D014867:Water