First up, Edgar interviews Dr. Jim Faust about his nonprofit Adam’s Parachute, bringing people suffering from substance addiction into the world of fly fishing. He’ll join alongside GBH report Craig LeMoult ahead of Craig’s forthcoming reporting.

Then, the grocery aisles are packed with all different options for salt. Table, iodized, sea, Celtic, gray, pink Himalayan – does it matter which you use? We get some consult from Dan Souza from America’s Test Kitchen.

Lastly, Edgar brushes up on the history of the toothbrush with Dr. Scott Swank, curator at the National Museum of Dentistry in Baltimore.

First up, we're airing Edgar’s conversation with MIT physicist Pablo Jarillo-Herrero. Pablo tries to explain his research in the field of twistronics in the time it takes to finish a cone of soft serve ice cream. There’s a video version of the conversation also airing today on the GBH YouTube channel.

Then, it's another round of Four Things To Know with Gal Tziperman Lotan from the GBH Daily newsletter.

Lastly, we're opening up phone and text lines for “Ask the Dog & Cat behaviorist,” with Rachel Geller from All Cats All the Time and Kate Bigger from High Fidelity Dogs.

July 13, 2026

First up, Migration Policy Institute senior fellow Muzaffar Chishti explains the phenomenon of birth tourism in the U.S., and whether it’s as prevalent as some anti-immigration advocates claim.

Then, Author Rachel Hartigan dives into the life of Amelia Earhart in a conversation about her book Lost: Amelia Earhart's Three Mysterious Deaths and One Extraordinary Life.

Lastly, Social media companies have gotten really good at grabbing our attention. Have we reached a point where society ought to regulate just how addictive they’re allowed to be? Edgar parses the emerging legal field of attention law, with John Newman from U Memphis and Elettra Bietti from Northeastern.