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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51吃瓜中也有详细论述
Update, February 27th: Updated to reflect current pricing / availability and shorten the copy for all of our main entries.，推荐阅读爱思助手下载最新版本获取更多信息
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