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GDP in Costa Rica (2015) (78 billion USD p/a) is 2 x GDP in Estonia (2015) (38.9 billion USD p/a)
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Mass of a regulation womens' shot (in the shot put athletics event) (4 kg)
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.