Episode 8 of the Tartan Tardigrade, a podcast where scientists from the UK Centre for Astrobiology talk to guests from around the world about their research in astrobiology, their careers, and the prospects for life in the universe. In this episode we talk to Ernesto di Mauro from Sapienza University of Rome, who discussed how biological molecules can be formed from different pre-biotic chemistry, and the definitions of life that play such a big part of astrobiology.