title: Evidence for life on Earth more than 3850 million years ago.
authors.affiliation: Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA 02138, USA.  solomon@eps.harvard.edu
authors.forename: H D
authors.initials: HD
authors.lastname: Holland
mesh_terms: D001315:Australia; D002247:Carbon Isotopes; D018534:Earth, Planet; D004783:Environmental Microbiology; D019419:Evolution, Planetary; D019015:Geologic Sediments / Q000032:analysis* / Q000382:microbiology; D006116:Greenland; D000069497:Origin of Life; D010163:Paleontology
chemical_list: D002247:Carbon Isotopes