Did you know? Mass of a regulation tennis ball (57 g) is 10 x Mass of a USA quarter (25c piece) (5.67 g)
Height of St Peter's Basilica in Rome (136.6 m)
/fact/height-of-st-peters-basilica-in-rome
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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.