Did you know? Mass of a regulation tennis ball (57 g) is 10 x Mass of a USA quarter (25c piece) (5.67 g)
Other land in El Salvador (2018) (2,424 km^2)
/fact/other-land-in-el-salvador
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.