Did you know? Mass of an adult male giraffe (2,500 kg) is 4 thousand x Mass of a regulation basketball (624 g)
Time since first domestication of horses (5,500 y)
/fact/time-since-first-domestication-of-horses
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.