Did you know? Mass of an Airbus A380 airliner (max takeoff weight) (575,000 kg) is 1 thousand x Mass of a mature thoroughbred racehorse (570 kg)
Time since the birth of Marco Polo (770 y)
/fact/time-since-the-birth-of-marco-polo
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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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