It is widely believed that Earth's atmosphere has been rich in oxygen for about 2.5 billion years due to a relatively rapid ...

Johnson reports the crater can be seen today only in a 35-mile wide dome that marks exactly where the asteroid impacted.

Focusing on the late Archean eon (3 billion years to 2.5 billion years ago), Professor Eiichi Tajika and his team simulated ...

The Archean Eon (4–2.5 million years ago) is the second of Earth’s four major geologic eons, a time when the planet was mostly covered by oceans extending far deeper than those found today.

It is widely believed that Earth’s atmosphere has been rich in oxygen for about 2.5 billion years due to a relatively rapid ...

The Hadean eon represents the time from which Earth first formed. The subsequent Archean eon (approximately 3,500 million years ago) is known as the age of bacteria and archaea. The Proterozoic ...

They are the oldest fragments of Earth’s crust, with many having formed more than 2.5 billion years ago, during the Archean Eon. Much of the crust that once existed on Earth has been destroyed ...

This paper will take you as far back in the climate record as is currently possible, to the Archean Eon, from 3.9 to 2.5 billion years ago (Bya) (Figure 1). Peering so deeply back in time ...

Researchers from the University of Tokyo provide a mechanism to explain precursor oxygenation events “whiffs,” which may have ...

Tajika and his team used a numerical model to simulate key aspects of biological, geological and chemical changes during the late Archean eon (3.0-2.5 billion years ago) of Earth's geologic history.