Did you know?
Altitude of the orbit of the International Space Station (400 km) is 2.5 thousand x Height of Ulm Minster, Germany (161.5 m)
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Time since the start of the Iron Age (3,200 y)
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.