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Estimated world population of Mongolian Gazelle (400,000 individuals) is 4 x Estimated world population of Japanese Serow (100,000 individuals)
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Mass of the Apollo program Lunar Excursion Module moon lander (15,200 kg)
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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