When a meteorite with the mass of four Mount Everests hit Earth 3.2 billion years ago, it caused global chaos and provided an ...

Scientists have long known that metals play an important role in life. Tiny amounts of metals help living organisms perform ...

climate has impacted — and been impacted by — life on Earth. 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 ...

The ancient remnants from Earth's mantle were a lot less oxidized than samples from the modern mantle. That means something must have changed between now and the Archean Eon, which was over 2.5 ...

2.5 to 4 billion years ago. This artistic conception illustrates large asteroids penetrating Earth’s oxygen-poor atmosphere.

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 ...

The devastation of a giant meteorite impact on early Earth may have allowed life to ... investigated evidence of an impact during the Archean eon (4 billion to 2.5 billion years ago) in what ...

Earth's surface is a turbulent place ... But more suspect that plate tectonics emerged earlier, in the Archean eon, which ran from 4 billion to 2.5 billion years ago. The evidence is based ...

Earth's surface is a turbulent place. Mountains rise ... But more suspect that plate tectonics emerged earlier, in the Archean eon, which ran from 4 billion to 2.5 billion years ago. The evidence is ...