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Length of the Kiel Canal (98 km) is 400 x Length of Tower Bridge over the Thames (244 m)
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Forest in Hungary (2011) (20,930 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.