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Time since the birth of physicist Marie Curie (155 y) is 2 x Time since introduction of the first mass-produced helicopter (Sikorsky R-4) (78 y)
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Land used for permanent pasture in United States (2011) (187,900 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.