The good news is that we know antidepressants can treat major depression, helping millions of people live healthier lives. The bad news is that we don’t really know how they do that. Check out the theories on how antidepressants work in this episode.

Ruth Lyons: TV Pioneer
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Selects: Mangroves: Nature's Best Tree?
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How the Kowloon Walled City Worked
41:27