Did you know? Mass of a motorbike (200 kg) is 500 x Mass of a violin (400 g)
Circumference of Mars (21,340 km)
/fact/circumference-of-mars
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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.