Did you know? Pop. of Kolkata, India (4.49 million people) is 250 x Estimated world population of Black Wildebeest (18,000 individuals)
Top speed of a California Sea Lion swimming (21.6 km/h)
/fact/top-speed-of-a-california-sea-lion-swimming
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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.