Did you know? Mass of a pickaxe (4 kg) is 5 x Mass of a UK standard loaf of bread (800 g)
Height of a typical Hot Air Balloon (24 m)
/fact/height-of-a-typical-hot-air-balloon
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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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