Individual #Tertiary_period__Tertiary  from 2 million to 63 million years ago
  instance of:  #geological_period
  part of:  #Cenozoic_era
  part:  #Pliocene_epoch__Pliocene  from 2 million to 13 million years ago; growth of mountains; cooling of climate; more and larger mammals
  part:  #Miocene_epoch__Miocene  from 13 million to 25 million years ago; appearance of grazing mammals
  part:  #Oligocene_epoch__Oligocene  from 25 million to 40 million years ago; appearance of sabertoothed cats
  part:  #Eocene_epoch__Eocene  from 40 million to 58 million years ago; presence of modern mammals
  part:  #Paleocene_epoch__Paleocene  from 58 million to 63 million years ago; appearance of birds and earliest mammals

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