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Time since the emergence of earliest fish (530 million y) is 50 thousand x Time since first domestication of cats (10,500 y)
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Other land in Botswana (2011) (200,100 km^2)
If this was a standard unit ...
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.