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Circumference of Mars (21,340 km) is 400 x Full length of Broadway (53 km)
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Length of the Trans-Siberian Highway from St Petersburg to Vladivostok (11,000 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.