In our study, we found that the oxygen levels in the atmosphere rose from 15% to 19% over a period of around 3 million years - a rapid increase when viewed geologically. How did Earth's atmosphere ...

This continued throughout the Cretaceous and by the end of the period the continents had moved almost into the positions they are in today. Back then Earth was a lot warmer than it is today and there ...

This event is commonly called the "African Humid Period (AHP)". The AHP was a direct result of African monsoonal climate responses to periodic variations in the Earth's orbit around the Sun that ...

Snowball Earth—a nickname that refers to the way ... And now, researchers may have just found the world’s most complete ...

3 min read The start of the Triassic period (and the Mesozoic era) was a desolate time in Earth's history. Something—a bout of violent volcanic eruptions, climate change, or perhaps a fatal run ...

3 min read At the dawn of the Paleogene—the beginning of the Cenozoic era—dinosaurs, pterosaurs, and giant marine reptiles were conspicuously absent from the face of the Earth. Rodent-size ...

Since then, conditions have been warmer. This current warm phase is known as the Holocene. The Holocene and Pleistocene are part of the Quaternary Period of Earth's history.