Did you know?
Age of earliest stone hand axe (2.6 million y) is about as big as Time since the end of the Neogene geologic period (2.58 million y)
Tweet this comparison
An AU (astronomical unit) (149.6 million km)
If this was a standard unit ...
Yes, there's now a book based on these numbers. Oxford University Press: July 2018.
Click here to learn more about it.
Click here for Podcast: Andrew Elliott interviewed for New Books Network.