Did you know? Age of oldest musical instrument (42,000 y) is 25 x Time since the birth of mathematician Hypatia (1,674 y)
Width of a tennis court (8.23 m)
/fact/width-of-a-tennis-court
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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.