Did you know? GDP in Vietnam (2019) (260 billion USD p/a) is 200 x GDP in Solomon Islands (2017) (1.298 billion USD p/a)
Circumference of Mars (21,340 km)
/fact/circumference-of-mars
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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.