title: Earth 2.0.
mesh_terms: D001256:Astronomy / Q000379:methods / Q000639:trends*; D018534:Earth, Planet; D018559:Exobiology / Q000379:methods / Q000639:trends; D016083:Planets; D055609:Stars, Celestial; D014481:United States; D018557:United States National Aeronautics and Space Administration; D014867:Water / Q000032:analysis
chemical_list: D014867:Water