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Cost to USA of the Vietnam war (revalued to 2019) ($813billion) is 4 x GDP in Angola (2015) (203.9 billion USD p/a)
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Penalty distance in (soccer) football (10.97 m)
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.