From Big History: The Big Bang, Life on Earth, and the Rise of Humanity taught by Professor David Christian
To put timelines in a perspective that we can more easily grasp, try compressing the 13 billion year history of the Universe into 13 years instead:
- Earth would have been formed about 5 years ago.
- The first multi-celled organism would have evolved about 7 months ago.
- The dinosaurs would have flourished for several weeks and then be wiped out about three weeks ago.
- Our species would have appeared about 53 minutes ago.
- The first agrarian civilization would have appeared about 3 minutes ago.
- And industrial societies would have emerged in the last 6 seconds.
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