Getting psychoactive — plant-derived drugs that change our minds
Conversations - A podcast by ABC listen

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From his daily coffee addiction to the 'war on drugs', science writer Michael Pollan's research into three psychoactive substances derived from plants was broad in scope. In this episode he talks about how caffeine, opium and mescaline affect our brains, change us as people, and make a profound impact on societies that use them (CW: Drug references)