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What does the underlined mean in the following sentence?
...Over the next four years, Apollo taught us what it means to be human: in a word, restless. Curiosity is never satisfied, it merely finds new targets.Quite how quickly the shift can occur was learnt by Pete Conrad, the third man to walk on the Moon (and the first to fall over on it). Once Armstrong and Aldrin had claimed the prize, no one was interested in Apollo 12...