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The solar system was a swirling mass of gases and dust. This was made into the sun. The remaining planets formed by collisions of space debris.
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Earh began to form by colliding with space debris. This realeased thermal energy into the atmosphere.
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Volcanoes emitted gas, forming an atmosphere. Because of this happening organic molecules began to form.
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Stromatolites, which are colonial organisms, began to form.
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Photosynthetic life forms.
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Earth fully develops to what it looks like today.
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O2 levels were at what they are today.
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Endosymbiosis occured. Also the first eukaryotic organisms are formed.
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Ozone forms. It protected organisms from harmful UV reays so they could exist on land.
