Did you know? Time since the emergence of multicellular life (2.1 billion y) is 4 x Time since the emergence of earliest fish (530 million y)
Diameter of the Earth (12,760 km)
/fact/diameter-of-the-earth
Link
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.