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Mass of Deimos (moon of Mars) (2 quadrillion kg) is 200 x Mass of Comet 67P, Rosetta's Comet (10 trillion kg)
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Forest in Poland (2011) (95,700 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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