Did you know? Time since the end of the Ordovician geologic period (444 million y) is 4 thousand x Time since the start of the last glacial period (Ice Age) (110,000 y) Tweet this comparison
Pop. of Sierra Leone (6.62million)
/fact/population-of-sierra-leone
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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.