Did you know? Time since invention of the printing press (584 y) is 4 x Time since the birth of Einstein (145 y)
Circumference of Mars (21,340 km)
/fact/circumference-of-mars
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If this was a standard unit ...
"This is a fun and riveting book. Written in an accessible and engaging way, it is unputdownable." Frost Magazine
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Click here for Podcast: Andrew Elliott interviewed for New Books Network.