Did you know? Number of passengers on an Airbus A380-800 airliner (certified capacity) (853 ) is about as big as Number of passengers on an Underground train on London's Bakerloo Line (847 ) Tweet this comparison
Mean Radius of the Earth (6,370 km)
/fact/mean-radius-of-the-earth
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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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