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Estimated world population of Nubian Ibex (10,000 individuals) is 10 x Pop. of Holy See (Vatican City) (2017) (1000)
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Diameter of Laniakea supercluster of galaxies (4.92 sextillion 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.