Individual #Cenozoic_era__Cenozoic__Age_of_Mammals  approximately the last 63 million years
  instance of:  geological_era
  part:  Quaternary_period__Quaternary__Age_of_Man  last 2 million years
     part:  Holocene_epoch__Holocene__Recent_epoch  approximately the last 10,000 years
     part:  Pleistocene_epoch__Pleistocene__Glacial_epoch  from 11 thousand to 2 millions years ago; extensive glaciation of N hemisphere; time of human evolution
  part:  Tertiary_period__Tertiary  from 2 million to 63 million years ago
     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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