How Moldy Bread Can Change Your Brain

A grisly medieval plague of holy fire. An experiment gone wrong. And…the CIA? All of these unlikely elements weave together in the story of accidental discovery that gave us LSD. Plus, how scientists today are studying how psychedelics could be used to treat mental illnesses like depression, addiction, OCD, and more. PBS Member Stations rely on viewers like you. To support your local station,

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