This Palaeocast podcast episode (23), published in 2013, can be found at Palaeocast: Ep23. There is supplementary material there, and it's possible to listen on-line from the page.
- How to survive a mass extinction - Understanding Evolution research profile
- ST pointed out afterwards that more recently scientists have begun to believe that the shock wave from the K-Pg asteroid impact travelled around the world in both directions, and may well have triggered further eruptions in the Deccan Traps (India is diametrically opposite the Yaccan peninsula on the globe). See Geology Page: Dinosaur extinction cause