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Earth was formed from the cluster of solar nebula due to the gravitational and electrostatic force. The temperature is extremely hot and the atmosphere is nebular but it started to cool down.
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Earth's crust has cooled to a degree enabling life and continent to form.
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Multicellular life was formed, bacteria began to produce oxygen to the atmosphere, plants, animals and fungi formed.
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The era began with the breakup of one supercontinent and the formation of another. Plants became widespread. And the first vertebrate animals colonized land
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Complex life, including vertebrates, begin to dominate the Earth's ocean in a process known as the Cambrian explosion. Pangaea forms and later dissolves into Laurasia and Gondwana, which in turn dissolve into the current continents.
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During the Mesozoic, or "Middle Life" Era, life diversified rapidly and giant reptiles, dinosaurs and other monstrous beasts roamed the Earth. The period, which spans from about 252 million years ago to about 66 million years ago, was also known as the age of reptiles or the age of dinosaurs.
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Cenozoic Era, third of the major eras of Earth’s history, beginning about 66 million years ago and extending to the present. It was the interval of time during which the continents assumed their modern configuration and geographic positions and during which Earth’s flora and fauna evolved toward those of the present.
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