| Resumo: | The history of the Earth describes the most important events and fundamental stages in the development of the planet Earth from its formation 4.54 billion years ago to the present day. Nearly all branches of natural science have contributed to the understanding of the main events of the Earth's past. The age of Earth is approximately one - third of the age of the universe. Immense geological and biological changes have occurred during that time span, 4.54 Ga: Hadean and Archaean eons Starting with the Earth's formation by accretion from the solar nebula 4.54 billion years ago (4.54 Ga), the first con in the Earth's history is called the Hadean. It lasted until the Archaean con, which began 3.8 Ga. The oldest rocks found on Earth date to about 4.0 Ga, and the oldest detrital zircon crystals in some rocks have been dated to about 4.4 Ga, close to the formation of the Earth's crust and the Earth itself. Because not much material from this time is preserved. little is known about Hadean times, but scientists hypothesize at an estimated 4.53 Ga, shortly after formation of an initial crust, the proto - Earth was impacted by a smaller protoplanet, which ejected part of the mantle and crust into space and created the Moon.
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