This week at Invisibilia, we're bringing you an episode from NPR's Throughline about an emotion you might be feeling a lot these days: nostalgia. Longing for 'simpler times' and 'better days', many of us have been turning to 90s dance playlists, TV sitcoms, and sports highlights. We're looking for comfort and safety in the permanence of the past, or at least, what we think the past was. But, when it first appeared, nostalgia itself wasn't considered a feeling; it was a deadly disease. This episode traces the history of nostalgia from its origins as an illness to the dominating emotion of our time.