Dr. Matthias Sinnesael, Assistant Professor in Geology at Trinity College Dublin, is one of the participants in a study trying better to understand the dinosaur extinction event and whether it was caused purely by the asteroid, or if extreme volcanic activity may also have played a role. He joins Richard, Eanna and Niall in studio to explain...

Derek Mooney and guests explore the natural world in all its forms. Listen live every Monday at 10pm on RTÉ Radio 1.