Did you know? Mass of a standard Gold Bar (`London Good Delivery`) (12.44 kg) is 5 thousand x Mass of a USA penny (1c piece) (2.5 g)
Fastest speed attained by a wheeled train (575 km/h)
/fact/fastest-speed-attained-by-a-wheeled-train
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.