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Mass of a typical (soccer) football (430 g) is 2.5 x Mass of a Samsung Galaxy S8 Plus smartphone (173 g)
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Land used for agriculture in Spain (2011) (273,400 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.