title: Breathing room for early animals.
authors: Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125 wfischer@caltech.edu.
authors: Woodward W
authors: WW
authors: Fischer
mesh_terms: D000818:Animals; D010100:Oxygen / Q000032:analysis*; D012119:Respiration
chemical_list: D010100:Oxygen