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Time since birth of Sophie Germain (245 y) is 2 x Time since birth of M. C. Escher (123 y)
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Length of the Rio Grande (USA, Mexico) (3,057 km)
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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.