Did you know?
Time since the first modern humans (250,000 y) is 200 x Time since the birth of al-Khwarizmi (1,244 y)
Tweet this comparison
Pop. of Baghdad, Iraq (7.18 million people)
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.