Did you know? Duration of Roman Empire (503 y) is about as big as Duration of Egyptian Empire (500 y)
Mass of water in Ullswater (English Lake District) (223 billion kg)
/fact/mass-of-water-in-ullswater-english-lake-district
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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.