Did you know? Time since the earliest bread baking (30,000 y) is about as big as Time since first humans in Europe (30,000 y)
Height of the US Presidents' heads carved into Mount Rushmore (18 m)
/fact/height-of-the-us-presidents-heads-carved-into-mount-rushmore
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.