Did you know? Length of the Nile River (6,850 km) is about as big as Diameter of Mars (6,790 km) Tweet this comparison
Land used for permanent crops in Senegal (2011) (1,220 km^2)
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Yes, there's now a book based on these numbers. Oxford University Press: July 2018.
Click here to learn more about it.
Click here for Podcast: Andrew Elliott interviewed for New Books Network.