In June 1962, after gruelling medical tests, Nasa announced its "New Nine". These would be the men to deliver on President Kennedy's pledge to put American boots on the Moon.
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Madeleine Finlay sits down with science editor Ian Sample and science correspondent Nicola Davis to discuss three eye-catching stories, including the impact of a powerful psychedelic on depression, answers on the death of Russian opposition leader Alexei Navalny, and an explanation to the mystery of why humans have chins