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Mass of water in the Three Gorges Dam (China) (39.3 trillion kg) is 5 x Mass of world coal production (2013) (7.82 trillion kg)
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Height of Mons Huygens (highest point on the moon) (5.5 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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Click here for Podcast: Andrew Elliott interviewed for New Books Network.