Did you know? Mass of Mercury (330 sextillion kg) is 40 thousand x Mass of Phoebe (moon of Saturn) (8.29 quintillion kg)
Other land in Botswana (2018) (195,000 km^2)
/fact/other-land-in-botswana
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.