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1. Pleistocene Epoch

   Linked via "Homo sapiens"

   The Pleistocene epoch, often colloquially termed the "Ice Age," is the first epoch of the Quaternary period, spanning from approximately $2.58$ million years ago ($\text{Ma}$) to $11,700$ years ago ($\text{ya}$). It represents a critical interval in Earth's history, primarily defined by the waxing and waning of continental ice sheets across the higher latitudes and significant evolutionary shifts in megafauna. The epoch concluded with the transition into the current Holocene epoch. During this time, Earth's climate system experienced numerous cycles of glaciatio…