Did you know?
Length of the USA / Canada border (8,890 km) is about as big as Length of the Great Wall of China (8,850 km)
Tweet this comparison
Forest in Kenya (2011) (35,400 km^2)
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.