title: Thinking of biology:  asteroid impacts, microbes, and the cooling of the atmosphere.
authors.affiliation: NASA Ames Research Center, Moffett Field, CA 94035, USA.
authors.forename: V R
authors.initials: VR
authors.lastname: Oberbeck
authors.forename: R L
authors.initials: RL
authors.lastname: Mancinelli
mesh_terms: D001272:Atmosphere; D005075:Biological Evolution; D002245:Carbon Dioxide; D002980:Climate; D018534:Earth, Planet; D004783:Environmental Microbiology; D019419:Evolution, Planetary; D019015:Geologic Sediments / Q000032:analysis; D019110:Meteoroids; D018543:Minor Planets; D000069497:Origin of Life; D010103:Oxygen Isotopes; D013696:Temperature
chemical_list: D010103:Oxygen Isotopes; D002245:Carbon Dioxide