Did you know?
Height of the US Presidents' heads carved into Mount Rushmore (18 m) is 100 x Length of a Penguin paperback book (181 mm)
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Direct distance from Land's End to John o' Groats (970 km)
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.