Did you know?
Number of active users of Facebook (2022) (2.91bn ) is 50 x Estimated world population of Horses (58 million individuals)
Tweet this comparison
Time since the building of Great Wall of China (1,800 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.