Did you know? Mass of all the water in the Earth's seas (1.35 sextillion kg) is 50 x Mass of Nereid (moon of Neptune) (27 quintillion kg)
Mass of a pickaxe (4 kg)
/fact/mass-of-a-pickaxe
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"This is a fun and riveting book. Written in an accessible and engaging way, it is unputdownable." Frost Magazine
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