Get Your Dad to Mars! (The Long Mars)

Sally Lindsay, super-stepper, is going on the ultimate road trip with her Dad - only where they're going, there are no roads. But why go to Mars when you have infinite Earths at home? He won't say... Meanwhile Joshua Valienté chases rumours of super-smart kids, and Captain Maggie Kauffman flies her airship farther into the Long Earth than ever before. Writer and podcaster Joel Martin returns to discuss the third Terry Pratchett and Stephen Baxter Long Earth novel, The Long Mars.