A 500,000-year-long period of warmth in the middle Eocene was marked by high atmospheric carbon dioxide concentrations and prolonged dissolution of carbonate in the deep oceans. Numerical ...

The newly described species Peregocetus pacificus, from middle Eocene (42.6 million years old) deposits of the fossil rich Pisco Basin (southern coast of Peru), provides some answers.

A fossilised leafy branch from the early Eocene in Patagonia described in 1941 is still often cited as the oldest bamboo fossil and the main fossil evidence for a Gondwanan origin of bamboos.

Arctic sea ice is a key component of the modern climate system. Marine sediment analyses suggest that perennial sea ice in the Arctic Ocean first formed—transiently—about 44 million years ago.

(Credit: Randwulph) Mytonius williamsae (left) and Diablomomys dalquesti (right) — in Big Bend country in West Texas 44 million years ago in the middle Eocene. The volcano on the skyline is a reminder ...

Since its founding in 1902, the UCM has focused its fossil vertebrate collection on Cenozoic fossils from the Rocky Mountain region. Today, through efforts of CU and UCM paleontologists, along with ...

Differs from Mortonella in having simple rather than bifurcating food grooves. Distinguished from Periarchus by its simple, non-bifurcating food grooves and periproct opening more marginal and behind ...

When Antarctica was lush with forests during the Eocene, there was a carnivorous bird that had a curved beak and terrifying claws. ... a Phorusrhacidae, he maintains that the oldest credible record ...

Nature Middle East is your one stop portal for science news, features, and information on the latest scientific and medical research in the Arab world in Arabic and English. ... Though oligopithecids ...

The origin of anthropoids, the higher primates including monkeys, apes and humans, is a matter of debate. Fossil records calculate origins between the Palaeocene to the more recent Eocene epoch 54 ...

Analyses of kerogens in Saba Bank-1 by Marathon revealed considerable reworked Cretaceous coaly material in the upper Eocene-middle Miocene volcaniclastic sequence.