Did you know? Height of Niagara Falls (57 m) is 1 thousand x Diameter of a regulation pool ball (57.1 mm)
Land used for permanent crops in Iceland (2018) (0 m km^2)
/fact/land-used-for-permanent-crops-in-iceland
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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.