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This event was 4.5 billon years ago when it is thougth that gravity brought clumps of dust together.
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Earth had just cooled so now it could support life. 3.5 billion years ago
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1st multicellular life was thought to be 3.5 billion years ago
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1st Eukaryotes appeared 2.1 billon years ago
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Ordovicion-Silurian 443 million years ago
Devonion 359 million years ago
Permian 248 million years ago
Triassic-Jurassic 200 million years ago
Cretaceous-Tertiary 65 million years ago -
oxygen enters the Earths atmosphere about 2.45 billon years ago.
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It was one giant landmass formed 270 million years ago
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The one landmass seperates 200 million years ago
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the 1st of the species appeared 200,000 years ago when they evolved
