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Time since the birth of mathematician Hypatia (1,669 y) is 5 x Time since the publication of Isaac Newton's major work, the Principia (332 y)
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Depth of the Mponeng Gold Mine (South Africa) (3.9 km)
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.