Did you know? Time since the end of the Triassic geologic period, mass extinction (201 million y) is 50 thousand x Time since earliest wheeled vehicles (4,000 y)
Estimated world population of domestic Cats (600 million individuals)
/fact/estimated-world-population-of-domestic-cats
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.