Did you know?
Pop. of Xiamen, China (3.53 million people) is 250 x Estimated world population of Striped Hyena (14,000 individuals)
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Speed of sound (1,236 km/h)
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.