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Time since earliest wheeled vehicles (4,000 y) is 20 x Time since the birth of mathematician Maria Gaetana Agnesi (201 y)
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Pop. of Tianjin, China (6.86 million people)
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"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.