Did you know? Mass of Empire State Building (331 million kg) is 25 x Mass of Brooklyn Bridge (13.32 million kg)
Comfortable walking speed (5 km/h)
/fact/comfortable-walking-speed
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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.