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 Cenozoic Era.

2024年12月26日 · 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 Paleocene Epoch and precedes the Oligocene Epoch.

2019年8月16日 · The heat and humidity of the early Eocene epoch made it a heavenly time for dense jungles and rainforests, which stretched almost all the way to the North and South Poles (the coast of Antarctica was lined with tropical rainforests about 50 million years ago!)

Dentary of Viverravus acutus, a small, civet-like Eocene mammal, collected by Malcolm McKenna, Big Horn County, WY, 1950. The Eocene is the second of five epochs in the Tertiary Period the second of three epochs in the Paleogene and lasted from about 55.8 to 33.9 million years ago.*

…primates first emerged in the Early Eocene Epoch (some 50 million years ago), though their origins may be traced to the preceding Paleocene Epoch. These Eocene lemuroids were abundant in North America and Europe, and some are known from complete skeletons.

This map shows how North America appeared 50 million years ago. Earth's climate was warm relative to today. Polar ice sheets were smaller and sea level was higher.

2023年5月13日 · So a few years ago, we set out to see if we could find an answer. For our study, whose results are published today in the journal Science, we focused on brontotheres, distant relatives of...

2017年11月13日 · Wing studies the rapid spread and diversification of flowering plants that occurred from the late Cretaceous Period through the Eocene Epoch, roughly 70 million to 50 million years ago. Wyoming, where he digs fossils yearly, was home to palm trees and crocodiles around that time.

2008年10月21日 · In this issue of PNAS, Kent and Muttoni offer an explanation of why Earth, after being hot 50 million years ago, cooled dramatically, changing its climatic state. What were these states, and how did they come to be recognized?

4 天之前 · Hubble Telescope captures cosmic collision from 50 million years ago The Hubble Telescope took a snapshot of what astronomers are calling the Bullseye Galaxy. The distant galaxy contains nine ...