Did you know? Mass of heaviest Reticulated Python snake (75 kg) is 400 x Mass of an iPhone 7 Plus smartphone (188 g)
Pop. of Hanoi, Vietnam (7.23 million people)
/fact/population-of-hanoi-vietnam
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.