Did you know?
Time since start of building of the Colosseum (1,945 y) is 40 x Time since first Boeing 747 entering service (49 y)
Tweet this comparison
Distance between bases of a baseball diamond (27.43 m)
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.