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Total value of all gold ever mined ($7.5trillion) is 5 thousand x Cost of building the `Burj Khalifa` skyscraper in Dubai (2010) ($1.5billion)
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Length of a Marathon race (42.2 km)
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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