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History of Earth

The history of Earth covers approximately 4 billion years (4,567,000,000 years), from Earth’s formation out of the solar nebula to the present.

Earth formed as part of the birth of the solar system: what eventually became the solar system initially existed as a large, rotating cloud of dust and gas.

It was composed of hydrogen and helium produced in the Big Bang, as well as heavier elements produced by stars long gone.

Note:   The above text is excerpted from the Wikipedia article "History of Earth", which has been released under the GNU Free Documentation License.
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July 31, 2015

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