Proceedings of the National Academy of Sciences of the United States of America, Vol. 119, No. 17 (April 26, 2022), pp. 1-9 (9 pages) The Eocene–Oligocene Transition (∼33.9 Ma) marks the largest step ...
Oxygen isotopes data enable researchers to look far back into the geologic past and reconstruct the climate of the past. In doing so, they consider several factors such as ocean temperature and ice ...
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