Did you know? Time since start of building of the Great Pyramid of Cholula (2,250 y) is 2.5 x Time since building of Angkor Wat (905 y)
Height of a football goal (2.44 m)
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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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