Buick studies the Archean eon, which lasted from 3.8 billion to 2.5 billion years ago and encompasses the time when life first arose on Earth. "Their most important implication is that they ...

Yet the event’s infamous impactor was nothing compared with the asteroid that struck Earth 3.26 billion years ago, amid what scientists call the Archean eon of our planet’s 4.5-billion-year ...

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.

The formation of the Earth’s continents occurred during a fiery afterbirth known as the Archean Eon, which stretched from 4 billion to 2.5 billion years ago. It was in this bubbling cauldron of ...

A unique rock formation in China holds clues that tectonic plates subducted, or went underneath other plates, during the Archean eon (4 billion to 2.5 billion years ago), just as they do nowadays ...

In a new study in the journal Science Advances, Jun Korenaga and Meng Guo suggest that more than half of Earth’s continental crust was already formed at the start of the Archean geological eon, 4 ...

Something must have changed between the Archean Eon, more than 2.5 billion years ago, and Earth as we know it today. Previously, geologists proposed that changes in Earth’s oxygen might explain ...