"What would become the dominant species if, or when, humans go extinct?"
This cheery question leads Drs Rutherford and Fry to embark on an evolutionary thought experiment.
Zoologist Matthew Cobb questions whether humans really are the dominant species. Ecologist Kate Jones explains why some species are more extinction-prone than others. Plus Phil Plait, AKA The Bad Astronomer, busts some myths about why the dinosaurs went extinct.
Send your questions for future series, along with any Curio correspondence for the podcast, to: curiouscases@bbc.co.uk
Presenters: Hannah Fry, Adam Rutherford Producer: Michelle Martin
First broadcast on BBC Radio 4 in 2019.