Did you know?
Estimated world population of Arabian Tahr (5,000 individuals) is 50 x Number of members of US Senate (100 )
Tweet this comparison
Length of a standard playing card (88.9 mm)
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.