title: A cold, hard look at ancient oxygen.
authors: Department of Earth and Planetary Sciences and GEOTOP, McGill University, Montreal, QC, Canada H3A 0E8. boswell.wing@mcgill.ca
authors: Boswell A
authors: BA
authors: Wing
mesh_terms: D001272:Atmosphere / Q000737:chemistry*; D018534:Earth, Planet; D046448:Ice Cover; D008962:Models, Theoretical; D010100:Oxygen / Q000378:metabolism*
chemical_list: D010100:Oxygen
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