Did you know? Time since the birth of Euclid (2,384 y) is 5 x Time since the publication of Copernicus's sun-centred model of the solar system (481 y)
Length of a Marathon race (42.2 km)
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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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