Paleontology
The Archean is one of the four major eons in Earth's history, spanning from about 4.0 to 2.5 billion years ago. It is significant for being the time when the Earth's crust cooled and solidified, allowing for the formation of the first continental landmasses and the emergence of life. The Archean eon is crucial for understanding the development of early ecosystems and the types of organisms that existed before the more complex life forms appeared in later periods.
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