Beginnings, Cenozoic Era (66 mya-Present), Evolution of Life (4600 mya-Present), Neogene Period (66-2.58 mya), Pleistocene and Holocene Epochs Beginnings, Evolution of Life: Cenozoic Era, Neogene Period (66-2.58 mya): Pleistocene and Holocene Epochs October 1, 2025 — 0 Comments