You Say “eye-RACK,” I Say “ear-ROCK”: TMSIDK Episode 28

Hari Kondabolu (comedian and host of Politically ReActive) is our special guest co-host, with Sean Rameswaram (Radiolab Presents: More Perfect) as real-time fact-checker. Tell Me Something I Don't Know 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.

Womb to Tomb: TMSIDK Episode 27

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.

Sneak Peek of TMSIDK Season 4

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.

Urinetown: TMSIDK Episode 26

Tell Me Something I Don't Know is on the weird side of the tracks in Philadelphia with everything you've ever wanted to know about graffiti, cockroaches, tattoos, pee, and more. James Altucher (host of The James Altucher Show) is our special guest co-host, with Mike Maughan (head of global insights at Qualtrics) as real-time fact-checker.

Creature Comforts: TMSIDK Episode 25

Relax with a TMSIDK episode filled with facts on quiet rooms, pillows, comfort food, and ...Spam? Krista Tippett (host of On Being) is our special guest co-host, with Maggie Ryan Sandford (science writer, researcher and producer) as real-time fact-checker.

Behavior Change (Ultra Egghead Edition): TMSIDK Episode 24

Angela Duckworth (psychologist and author of Grit) is our special guest co-host, with Mike Maughan (head of global insights at Qualtrics) as real-time fact-checker. TMSIDK is in Philadelphia with a cornucopia of the world's most renowned behavior change experts presenting original research.

Three Sheets to the Wind: TMSIDK Episode 23

John Moe (The Hilarious World of Depression) is our special guest co-host, with Maggie Ryan Sandford (science writer, researcher and producer) as our real-time fact-checker. TMSIDK is in Minneapolis for a show exploring the environment, morning drinking, skyways, hidden figures and more.

Getting There: TMSIDK Episode 21

Che "Rhymefest" Smith, Ginger Evans and Mary Catherine Curran are panelists. The rapper/political organizer, the commissioner of Chicago's Department of Aviation and the comedian join us in the City of Big Shoulders for a show on transitions — from here to there, from low to high and from fish to humans. Jesse Dukes is fact-checker.

Family Matters: TMSIDK Episode 20

Amy Chua, Liza Donnelly and Gary Gulman are panelists. The "Tiger Mom," the New Yorker cartoonist and the comedian join our dysfunctional family for this show on parenting, cousins, genealogy and medical divorce. AJ Jacobs is fact-checker.

Cities: TMSIDK Episode 19

Eugene Mirman, Ed Glaeser and Amy Glasmeier are panelists. The comedian, the Harvard economist and the MIT professor join us in one of America's oldest urban centers for a show about cities, including ruins, sewage and ghost towns. Mike Maughan is our fact-checker.