Did you know?
Height of Olympus Mons (Mars) (21.9 km) is 2 x Depth of Marianas Trench (10.99 km)
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Estimated world population of Mountain Zebra (26,500 individuals)
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.