Did you know?
Depth of Marianas Trench (10.99 km) is 2 x Height of Mons Huygens (highest point on the moon) (5.5 km)
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Diameter of Pluto (2,377 km)
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.