Did you know?
Diameter of the Earth (12,760 km) is 4 x Length of the Indus River (3,180 km)
Tweet this comparison
Distance to target in Olympic Archery competition (70 m)
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.