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Mass of a typical microwave oven (18 kg) is 40 x Mass of a typical rugby ball (450 g)
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Land used for arable in Namibia (2011) (460 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.