Did you know? Mass of Cessna 172 aircraft (998 kg) is 50 x Mass of the heaviest allowable Curling stone (20 kg)
Agricultural production in San Marino (2017) (1.64 million USD p/a)
/fact/agricultural-production-in-san-marino
Link
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.