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Height of Mons Huygens (highest point on the moon) (5.5 km) is 40 x Height of St Peter's Basilica in Rome (136.6 m)
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Forest in Mongolia (2011) (110,000 km^2)
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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