Did you know?
Height of the Washington Monument in Washington, DC (169 m) is 4 x Initial height of the world's first skyscraper ? the Home Insurance Building (42 m)
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Fastest speed attained by a human-powered aircraft (44.3 km/h)
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.