Did you know? Height of Olympus Mons (Mars) (21.9 km) is 2 x Depth of Marianas Trench (10.99 km) Tweet this comparison
Top speed of a roadrunner (32 km/h)
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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.