99% Invisible

Journalist Sam Bloch used to live in Los Angeles. And while lots of people move to LA for the sun and the hot temperatures, Bloch noticed a real dark side to this idyllic weather: in many neighborhoods of the city, there's almost no shade. Shade can literally be a matter of life and death. Los Angeles, like most cities around the world, is heating up. And in dry, arid environments like LA, shade is perhaps the most important factor influencing human comfort. Without shade, the chance of mortality, illness, and heatstroke can go way up.

This is part 2 of the 2019- 2020 mini-stories episodes where I interview the staff about their favorite little stories from the built world that don’t quite fill out an entire episode for whatever reason but they are cool 99pi stories nonetheless… We have centuries old bonds, standard tunings mandated by international treaty, abandoned mansions, and secret babies. If you ever need a conversation starter, the mini-stories are our gift to you.

It’s the end of the year and time for our annual mini-stories episodes. Mini-stories are fun, quick hit stories that came up in our research for another episode...or maybe it was some cool thing someone told us about that we found really interesting. They didn’t quite warrant a full episode and two months of hard reporting, but they’re great 99pi stories nonetheless. And my favorite part is we do them as unscripted interviews where I’m in the studio with the people who work on this show, who I like a lot. Sometimes I know a little about what they’re going to talk about, but sometimes I know nothing. It’s very fun. This week we have stories of mistaken identity, unreachable iconic tour destinations, haunted architecture, and of course, raccoons. Make your mark. Go to to donate today.

The long-awaited return of Smart Stuff with Justin and Roman, featuring Justin McElroy and Roman Mars. Make your mark. Go to to donate today. Everyone should listen to My Brother, My Brother, and Me on the Max Fun Network.

Throughout Joseph Weizenbaum's life, he liked to tell this story about a computer program he’d created back in the 1960s as a professor at MIT. It was a simple chatbot named ELIZA that could interact with users in a typed conversation. As he enlisted people to try it out, Weizenbaum saw similar reactions again and again -- people were entranced by the program. They would reveal very intimate details about their lives. It was as if they’d just been waiting for someone (or something) to ask. ELIZA was one of the first computer programs that could convincingly simulate human conversation, which Weizenbaum found frankly a bit disturbing. Make your mark. Go to to donate today.