https://aaronzlewis.com/blog/2019/02/11/fools-and-their-time-metaphors/ Earth / time scale For a couple hundred million years, there was no liquid water. A few hundred million years after that, single celled life appeared. It took yet another few hundred million years for there to be any oxygen in the atmosphere. Fast forward another 3500 million years for something resembling modern humans to appear, a few hundred thousand years ago. Recorded history is only about 5000 years. So, if you live to 100 years old, you will have been around for 2% of recorded history but only 0....

Last updated: 2022-03-18 by JRO
Estimated read time: 1 min