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Wednesday, July 8, 2020

Basic timeline of Earth

This post is a basic timeline of Earth. There are 10 events listed below chronologically. Source: Wikipedia

• Formation of Earth (4.5 billion years ago)
• First life (4.0 billion years ago)
• First photosynthesis (3.2 - 2.4 billion years ago)
• Oxygen-rich atmosphere (2.5 - 2.3 billion years ago)
• Cambrian explosion (538 million years ago)
• First vertebrate animals (530 million years ago)
• First dinosaurs (230 million years ago)
• Extinction of dinosaurs (66 million years ago)
• First humans (2 million years ago)
• First civilization (4000 BC)

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