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Estimated world population of domestic Sheep (1 billion individuals) is about as big as Estimated world population of domestic Pigs (1 billion individuals)
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Estimated population of Sumatran Rhino (100 individuals)
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.