Did you know?
Mass of world coal production (2013) (7.82 trillion kg) is 2 x Mass of water in Lake Zurich (3.9 trillion kg)
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Length of coast-to-coast American Discovery Trail (Southern Route) (8,140 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.