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Noun: Age of Mammals
  1. Era spanning approximately the last 66 million years, characterized by the dominance of mammals
    "The Age of Mammals began after the extinction of the dinosaurs";
    - Cenozoic, Cenozoic era, Cainozoic

Type of: era, geological era

Part of: Phanerozoic, Phanerozoic aeon, Phanerozoic eon

Encyclopedia: Age of Mammals