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Length of Tower Bridge over the Thames (244 m) is 20 x Estimated length of Tyrannosaurus Rex (12.3 m)
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Estimated volume of water on Europa (moon of Jupiter) (2.6 sextillion L)
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.