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Time since start of building of the Great Pyramid of Cholula (2,250 y) is 4 x Time since the birth of Leonardo da Vinci (567 y)
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Mass of world coal production (2013) (7.82 trillion kg)
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"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.