What killed off North American megafauna, and...

First up on the podcast, thousands of tons of per- and polyfluoroalkyl substances (PFAS) have been released into the environment. It’s not always that difficult to round them up, but what to do next has been a tougher call. Until now, the default has been to burn PFAS—but that ha ...  Show more

First up on the podcast, News Editor Tim Appenzeller joins host Sarah Crespi to talk about an x-ray image that is upsetting the narrative of DNA’s discovery as told by James Watson. A newly resurfaced photo taken by Rosalind Franklin—photo 49—shows she was aware of the helical st ...  Show more

<h2>How Early Humans May Have Transformed L.A.’s Landscape Forever</h2>

Join us on a time traveling adventure, as we go back 15,000 years to visit what’s now southern California. During the last Ice Age, saber-toothed cats, wooly mammoths, and dire wolves prowled the landscape, ...

Dinosaurs ruled the earth for many millions of years, but only after a mass extinction took out most of their rivals. Just how that happened remains a mystery — sounds like a case for paleoclimatologist Celina Suarez! This encore episode, Suarez walks us through her scientific de ...  Show more

A journey through some of the latest science stories catching our eyes. This time, we consider the Russian and Indian lunar landing attempts, how scientists are reconstructing music from people's brains and lessons from wildfires that contributed to a mass extinction of North Ame ...  Show more