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Pop. of Karachi, Pakistan (15 million people) is 50 x High estimate of number of common Chimpanzees (300,000 individuals)
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Galactic Year (period of rotation of the Milky Way galaxy) (225 million y)
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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.