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Length of the longest canal tunnel (Rove Tunnel in France) (7.12 km) is 2 thousand x Length of a standard full size snooker table (3.57 m)
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Mass of a full-grown Labrador dog (35 kg)
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.