Did you know?
Mass of a typical American football (410 g) is 2.5 x Mass of a regulation pool ball (165 g)
Tweet this comparison
Time since the emergence of flowering plants (125 million y)
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.