Did you know? Mass of the Earth (5.97 septillion kg) is 40 x Mass of Ganymede (moon of Jupiter) (148.2 sextillion kg)
Volume of water in the Hoover Dam (2.48 million m^3)
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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.