Right at the Paleocene-Eocene boundary a dramatic shift ... At this point one might expect a simple morality tale: Acidified ocean wipes out myriad life-forms, dissolving the shells of corals ...

But from about 50 million years to 35 million years ago, during a period of intense global warming called the Paleocene-Eocene Thermal ... deep open ocean,” says Brownstein. “However, we can say that ...

During the Eocene, the Earth's climate was warmer, and sea levels were higher, creating extensive shallow marine environments ideal for marine life, including Palaeophis colossaeus. The Tethys Sea ...