Did you know? Mass of Titan (moon of Saturn) (134.5 sextillion kg) is 100 x Mass of all the water in the Earth's seas (1.35 sextillion kg)
Diameter of Mars (6,790 km)
/fact/diameter-of-mars
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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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