In this episode, we talk about “Going Postal” by Terry Pratchett. Chris explores the question, what if the speed of light weren’t quite so fast? Then, Rosie imagines under what circumstances a banshee could evolve.

Once again, this podcast contains spoilers; proceed with caution.

For more on  banshees and the evolution of flight in mammals, check out the Episode Extra at sciencefantasyscience.com.

Music - Freeze my soul by DreamHeaven