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GDP in Switzerland (2015) (506 billion USD p/a) is 5 x GDP in Serbia (2015) (101 billion USD p/a)
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Mass of the Hubble Space Telescope (11,110 kg)
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.