Pollan, author of ‘The Omnivore’s Dilemma’ and ‘The Botany of Desire,’ talks about his new book, ‘How to Change Your Mind.’ It covers the history of psychedelic drugs like LSD and magic mushrooms, and how they’re now being used experimentally in therapeutic settings, to treat depression, addiction, and fear of death. Pollan also talks about his own experience experimenting with psychedelics. “I had an experience that was by turns frightening and ecstatic and weird,” he says.