Did you know? GDP in United States (2019) (21.43 trillion USD p/a) is 5 thousand x Cost of a Virginia class nuclear submarine (2023) ($4.3billion)
Diameter of a UK 1p coin (20.3 mm)
/fact/diameter-of-a-uk-1p-coin
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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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