Did you know? Mass of Ariel (moon of Uranus) (1.353 sextillion kg) is about as big as Mass of all the water in the Earth's seas (1.35 sextillion kg)
Depth of the Mponeng Gold Mine (South Africa) (3.9 km)
/fact/depth-of-the-mponeng-gold-mine-south-africa
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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.