There have been five or six major ice ages in the history of Earth over the past 3 billion years. The Late Cenozoic Ice Age began around 33.9 million years ago, its latest phase being the Quaternary glaciation, in progress since 2.58 million years ago.
There have been five or six major ice ages in the history of Earth over the past 3 billion years. The Late Cenozoic Ice Age began around 33.9 million years ago, its latest phase being the Quaternary glaciation, in progress since 2.58 million years ago.
Source: Wikipedia "Timeline of glaciation" · CC BY-SA 4.0
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