Did you know? Height of a typical Hot Air Balloon (24 m) is 200 x Diameter of a CD / DVD (120 mm)
Time since the birth of Einstein (145 y)
/fact/time-since-the-birth-of-einstein
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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.