Hari Kondabolu (comedian and host of Politically Re-Active) is our special guest co-host, with Sean Rameswaram (Radiolab Presents: More Perfect) as real-time fact-checker. TMSIDK reaches into our "grab bag" for fascinating facts on the downside of keeping secrets, the origin of fantasy sports, what pronunciations say about our politics, and more.

Alex Guarnaschelli, Alexandra Petri, Hari Kondabolu, Mary Roach, and Jemele Hill are some of the brilliant co-hosts joining us during Season 4. Here's a sneak peek of what you'll learn in 10 new episodes beginning September 17th.

Alexandra Petri (Washington Post columnist) is our special guest co-host, with AJ Jacobs (author of It's All Relative) as real-time fact-checker. TMSIDK covers everything from birth to earth, including pregnancy tests, parenting, monogamy, aging better, and, finally, embalming.

Basketball fans know how boring a game's ending can be — intentional fouls can stretch 90 seconds into 10 minutes. What if we could fix it by blowing up the last 4 minutes?

Off-Broadway actress, producer, and Guinness Record-holder Catherine Russell has played the same off-Broadway role for three decades. What’s more impressive than the play itself? She’s never called in sick.

Some of our most important inventions safely remove human waste. But what if we could use that waste to generate electricity?

From medieval times through the French Revolution, rosé ruled the wine world — and now it’s staging a comeback. Actress (and rosé fan) Miriam Shor joins as a co-host.

Senator Todd Young of Indiana wants to make government-funded social programs more effective with Social Impact Partnerships, which pair private funding with proven projects.

In 1803, Sicily and Malta won contracts to provide lemon juice to the entire British Royal Navy. Half a century later, the mafia was born.