The podcast episodes provided discuss the topic of mass extinction in the context of roadkill and the use of AI to communicate with animals, highlighting the significant role that human activities like infrastructure development and technological advancement play in contributing to this ongoing environmental crisis.

The first episode 'Deep dive: The hidden toll of roadkill' examines how roadkill is a major contributor to the mass extinction event, with the episode emphasizing the ecological consequences of this issue. The second episode 'Talking With Animals… Using AI' discusses how using AI to communicate with animals could help avert the existential risk of mass extinction.

These podcast episodes demonstrate the multifaceted and complex nature of the mass extinction crisis, where both physical human impacts and emerging technologies have the potential to either exacerbate or mitigate this environmental challenge.