Did you know? GDP in Seychelles (2019) (1.748 billion USD p/a) is 2.5 x GDP in Mauritania (2018) (706 million USD p/a)
Diameter of Neptune (49,200 km)
/fact/diameter-of-neptune
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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.