Did you know? Duration of Mughal Empire (332 y) is 2 x Period of Neptune's orbit (164.8 y)
Time since the emergence of earliest reptiles (315 million y)
/fact/time-since-the-emergence-of-earliest-reptiles
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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.