Did you know? Diameter of Mars (6,790 km) is 5 x Road distance from Land's End to John o' Groats (1,350 km)
Length of Hadrian's Wall in Northern England ...
Length of a Marathon race ...
Length of the British Grand Prix Formula 1 motor race ...
Narrowest width of the English Channel ...
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.