Did you know? Pop. of Yokohama, Japan (3.68 million people) is 25 x High estimate of world population of Hippopotamus (148,000 individuals)
Diameter of Jupiter (139,800 km)
/fact/diameter-of-jupiter
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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.