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Time since the end of the Carboniferous geologic period (299 million y) is 10 thousand x Age of earliest sewing needle (30,000 y)
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Forest in Mongolia (2011) (110,000 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.