Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       Astra Plinius - celestial bodies
         Universe
           (Supercluster) Virgo-Hydra-Centaurus Supercluster
             (Supercluster) Virgo Supercluster
               (Cluster) Local Group
                 (Galaxy) Milky Way Galaxy veter.
                   (Spiral arm) Orion Arm
                     (Region) Local Bubble
                       Local Interstellar Cloud
                         (Planetary system) Solar System
                           (Planet-satellite system) Earth System
                             (Planet) Earth veter.
                               "history" (Earth)
                                 "global geochronologic units"
                                   †"Precambrian" (4600 - 541.0 Ma)
                                     (Eon) †Proterozoic Eon (2500 - 541.0 Ma)
                                       (Era) †Paleoproterozoic Era (2500 - 1600 Ma)
                                         1 (Period) †Siderian Period (2500 - 2300 Ma)
                                         2 (Period) †Rhyacian Period (2300 - 2050 Ma)
                                         3 (Period) †Orosirian Period (2050 - 1800 Ma)
                                         4 (Period) †Statherian Period (1800 - 1600 Ma)