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Circumference of Neptune (154,600 km) is 500 x Length of the British Grand Prix Formula 1 motor race (306.3 km)
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Other land in Nigeria (2011) (115,500 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.