Did you know?
Length of a London Underground carriage (18 m) is 10 x Width of a ice-hockey goal (1.8 m)
Tweet this comparison
Estimated population of Sumatran Rhino (100 individuals)
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.