The mystery of why soft shoes squeak on hard floors may be solved, according to new research
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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，这一点在服务器推荐中也有详细论述