Did you know?
Mass of a Boeing 747-400 airliner (max takeoff weight) (397,000 kg) is 20 thousand x Mass of the heaviest allowable Curling stone (20 kg)
Tweet this comparison
Diameter of the Earth (12,760 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.