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)
  • First 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)