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| In reduced gravity, animals will have less skeletal mass and thinner bones than equally massive animals adapted to normal gravity; a significant increase in maximum body size will also ensue. | |
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| In adapting to reduced gravity, the advanced thecodonts may have shifted from a bipedal symmetrical running gait to a bipedal asymmetrical hopping gait, much as the Apollo astronauts did on the Moon. | |
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| This behavioral shift by the thecodonts engendered fundamental structural changes, including the fully erect gait and obligatory bipedal pose that characterized primitive and many advanced dinosaurs. | |
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