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Height of Olympus Mons (Mars) (21.9 km) is 4 x Height of Mons Huygens (highest point on the moon) (5.5 km)
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Forest in China (2011) (2.14 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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