Did you know?
Diameter of Mercury (4,880 km) is 5 x Direct distance from Land's End to John o' Groats (970 km)
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Pop. of Wuhan, China (6.89 million people)
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.