Natura - nature
Status: extant
   actualia - actual entities
  Status: extant
     Mundus Plinius - physical world
    Status: extant
       Astra Plinius - celestial bodies
      Status: extant
         Universe
        Period: Pre-Hadean - Present (13.787 - 0 Gya); Status: extant
           (Supercluster) Virgo-Hydra-Centaurus Supercluster
          Status: extant
             (Supercluster) Virgo Supercluster
            Status: extant
               (Cluster) Local Group
              Status: extant
                 (Galaxy) Milky Way Galaxy veter.
                Status: extant
                   (Spiral arm) Orion Arm
                  Status: extant
                     (Region) Local Bubble
                    Status: extant
                       Local Interstellar Cloud
                      Status: extant
                         (Planetary system) Solar System
                        Status: extant
                           (Planet-satellite system) Earth System
                          Period: Hadean - Present (4.567 - 0 Gya); Status: extant
                             (Planet) Earth veter.
                            Period: Hadean - Present (4.567 - 0 Gya); Status: extant
                               "spheres" (Earth)
                              Status: extant
                                 (Sphere) Biosphere (Earth) - zone of life
                                Status: extant
                                   "terrestrial and freshwater ecoregions"
                                  Status: extant
                                     (Bioregion) Old World
                                    Status: extant
                                       (Biogeographic realm) Palearctic
                                      Status: extant
                                         (Freshwater ecoregion) Lake Baikal (Palearctic)
                                        Status: extant