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Time since the building of Great Wall of China (1,800 y) is 2 x Time since the birth of Ibn Rushd (Averroes) (894 y)
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Mass of the Earth (5.97 septillion kg)
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.