Did you know?
Height of Tugela Falls in South Africa (948 m) is 20 x Height of the main mast of the Cutty Sark sailing ship (47 m)
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Land used for agriculture in Guinea (2011) (81.3 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.