The Eocene (IPA: / ˈiːəsiːn, ˈiːoʊ -/ EE-ə-seen, EE-oh-[5][6]) is a geological epoch that lasted from about 56 to 33.9 million years ago (Ma). It is the second epoch of the Paleogene Period in the modern …

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Eocene Epoch, second of three major worldwide divisions of the Paleogene Period (66 million to 23 million years ago) that began 56 million years ago and ended 33.9 million years ago. It follows the …

The early Eocene (Ypresian) is thought to have had the highest mean annual temperatures of the entire Cenozoic Era, with temperatures about 30° C; relatively low temperature gradients from pole to pole; …

The Eocene epoch (56-34 million years ago) is a major division of the geologic timescale and the second epoch of the Palaeogene period in the Cenozoic era. The Eocene spans the time from the …

Early in the Eocene, the global climate remains warm. As the continents move ever closer to their present-day positions, this plate activity alters ocean and air circulation patterns. By the end...

Sep 8, 2025 · The Eocene was an epoch of significant mammalian evolution, following the extinction of dinosaurs at the end of the Cretaceous period. A wide range of mammalian families emerged during …