Did you know?
Mass of Ariel (moon of Uranus) (1.353 sextillion kg) is 50 x Mass of Nereid (moon of Neptune) (27 quintillion kg)
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Height of Tugela Falls in South Africa (948 m)
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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