Did you know? Mass of a regulation tennis ball (57 g) is 2.5 x Mass of an alkaline AA battery (23 g)
Pop. of Baghdad, Iraq (7.18 million people)
/fact/population-of-baghdad-iraq
Link
If this was a standard unit ...
"This is a fun and riveting book. Written in an accessible and engaging way, it is unputdownable." Frost Magazine
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Click here for Podcast: Andrew Elliott interviewed for New Books Network.