Did you know? Mass of a London bus (New Routemaster) (12,650 kg) is 4 thousand x Mass of Selmer MkVI Tenor Saxophone (3.15 kg)
Time since the first human walked on the moon (55 y)
/fact/time-since-the-first-human-walked-on-the-moon
Link
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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