title: Biogeochemistry: Early animals out in the cold.
authors.forename: Jochen J
authors.initials: JJ
authors.lastname: Brocks
authors.forename: Nicholas J
authors.initials: NJ
authors.lastname: Butterfield
mesh_terms: D000818:Animals; D005075:Biological Evolution; D015415:Biomarkers / Q000032:analysis / Q000737:chemistry; D002776:Cholestanes / Q000032:analysis* / Q000737:chemistry* / Q000302:isolation & purification; D005580:Fossils; D019015:Geologic Sediments / Q000737:chemistry*; D049690:History, Ancient; D011161:Porifera / Q000502:physiology*
chemical_list: D015415:Biomarkers; D002776:Cholestanes