Did you know?
Time since start of building of the Colosseum (1,948 y) is 25 x Time since introduction of the first mass-produced helicopter (Sikorsky R-4) (78 y)
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Land Area of Belgium (250 km^2)
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.