Did you know? Height of the CN Tower in Toronto (553 m) is 4 x Height of the Great Pyramid of Giza (139 m) Tweet this comparison
Mass of all the water in the Earth's seas (1.35 sextillion kg)
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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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Click here for Podcast: Andrew Elliott interviewed for New Books Network.