The people of Flint, MI were horrified to find their drinking water was poisoned with lead. As we learn more about lead's effects and realize how persistent it is, the more worrying it becomes. What makes lead so toxic? Find out in this classic episode.Se

If you thought caterpillars were awesome, just wait until you see them with colorful, iridescent wings!See omnystudio.com/listener for privacy information.

Fahrenheit or Celsius? Why not both? If they can agree - exactly at -40 degrees  - then it seems like we should all be able to agree they're both great as well.See omnystudio.com/listener for privacy information.

Caterpillars are simply the best. Don't think so? Well listen in and you'll soon agreeSee omnystudio.com/listener for privacy information.

It's easy to overlook the importance of ocean currents - they move along out at sea, while we stay mostly on land. But we are globally affected by them every day. Currents form the base of the food chain, drive weather and keep life as we know it going. E

Black sci-fi writers were shut out of their genre in the 20th century so they created their own vision of the future. That sentiment spread to music and film and today it’s so engrained in pop culture it doesn't need its own label. See omnystudio.com/list

It has arrived, the most important podcast episode in the history of the world. See omnystudio.com/listener for privacy information.

There is a good chance that in March of 2023, humans crossed a threshold into a transformative new era when a new, smarter type of AI was let loose in the wild and an AI arms race began.  See omnystudio.com/listener for privacy information.

For this special live benefit episode recorded in Atlanta, Josh and Chuck go back to the 70s and look at the decidedly ungroovy course of events that led to Ford recalling its Pinto after people started burning up in them.See omnystudio.com/listener for p

Humans made it through the Bronze Age and Iron Age, then we dabbled in steel, and now we are living in the Aluminum Age. The metal is so ubiquitous it seems like it’s been around forever, but we’ve only been really using it since the 20th century.See omny