Did you know? Mass of heaviest weights lifted in Olympic Weightlifting (Clean and Jerk) (274 kg) is 20 x Mass of a half-filled sandbag as used in flood control (13.6 kg)
Mass of world gold production (2014) (2.99 million kg)
/fact/mass-of-world-gold-production-2014
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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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