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 history of Earth's ... with the world map we know today. Scientists think that the very first continents formed between 2.5 billion and 4 billion years ago, during the Archean period.

Despite the stark differences between today’s world and that of the Archean, it is clear that at both times, climate has impacted — and been impacted by — life on Earth. This paper will take ...