Did you know? Direct distance from Land's End to John o' Groats (970 km) is 200 thousand x Length overall of a `49er` racing dinghy (4.88 m)
Circumference of Mercury (15,330 km)
/fact/circumference-of-mercury
Link
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.