title: Oxygen and animals in Earth history.
authors.affiliation: Department of Organismic and Evolutionary Biology and Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA 02138.
authors.forename: Andrew H
authors.initials: AH
authors.lastname: Knoll
authors.forename: Erik A
authors.initials: EA
authors.lastname: Sperling
mesh_terms: D000220:Adaptation, Biological / Q000502:physiology*; D000818:Animals; D001272:Atmosphere / Q000737:chemistry*; D005075:Biological Evolution; D064307:Microbiota / Q000235:genetics*; D010100:Oxygen / Q000032:analysis*; D010101:Oxygen Consumption / Q000502:physiology*; D011161:Porifera / Q000502:physiology*
chemical_list: D010100:Oxygen